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Class   204	CHEMISTRY: ELECTRICAL AND WAVE ENERGY
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Class 205 is an integral part of this Class (Class 204), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	155	Electrical, or wave energy in magnetic field

156

With discharge

157.15

Processes of treating materials by wave energy

157.2

Isotope separation or enrichment

157.21

Inorganic product produced

157.22

Using laser

157.3

Removing a component from normally gaseous mixture

157.4

Process of preparing desired inorganic material

157.41

Using laser

157.42

Using sonic or ultrasonic energy

157.43

Using microwave energy

157.44

Using ionizing radiation

157.45

Boron, phosphorous or silicon containing product produced

157.46

Nitrogen containing product produced

157.47

Carbon containing product produced

157.48

Halogen containing product produced

157.49

Sulfur containing product produced

157.5

Oxygen containing product produced

157.51

Metal oxide or hydrate thereof

157.52

Hydrogen containing product produced

157.6

Process or preparing desired organic product containing at least one atom other than carbon and hydrogen

157.61

Using laser

157.62

Using sonic or ultrasonic energy

157.63

Using ionizing radiation

157.64

Nitrogen, sulfur, phosphorous or silicon containing product produced

157.65

Carbocyclic ring containing product produced

157.67

Vitamin product produced

157.68

Carbohydrate or protein product produced

157.69

Heterocyclic product produced

157.7

Hetero sulfur containing

157.71

Hetero nitrogen containing

157.72

Hetero nitrogen ring contains at least two hetero atoms

157.73

Phosphorous product produced

157.74

Silicon product produced

157.75

Heavy metal product produced

157.76

Sulfur product produced

157.77

Nitrogen containing

157.78

Oxygen containing

157.79

Halogen containing

157.8

Halogen containing

157.81

Nitrogen product produced

157.82

Oxygen containing

157.83

Nitroso or oxime containing

157.84

Halogen containing

157.85

Carbon triple bonded to nitrogen containing

157.86

Halogen containing

157.87

Carboxylic acid or derivative product produced

157.88

Oxygen other than as part of a carboxylic acid or derivative moiety

157.89

Atom other than carbon, hydrogen or oxygen

157.9

Alcohol product produced

157.91

Fused or bridged ring containing

157.92

Ether product produced

157.93

Aldehyde or ketone product produced

157.94

Halogen product produced

157.95

Carbon and halogen only in product

157.96

Carbocyclic ring containing

157.97

Aryl ring containing

157.98

Unsaturated product

157.99

Unsaturation in aryl ring

158.1

Carbocyclic ring containing

158.11

Two or more diverse halogen atoms containing

158.12

Four or more carbon atoms containing

158.14

At least one carbocyclic ring and only carbon and hydrogen atoms in product produced

158.2

Processes of purifying materials

158.21

Organic material purified

Note: See subclasses 900-914 for art collections pertaining to subclasses 157.15-157.21.
	164	Electrostatic field or electrical discharge

165

Organic

166

Vitamins

167

Fats, fatty oils, ester type waxes, or higher fatty acids

168

Hydrocarbons

169

Halogenated or oxidized

170

Gaseous

171

Acetylene

172

Cracking hydrocarbon oils

173

Carbon

174

Sulfur-oxygen compounds

175

Hydrogen peroxide

176

Ozone

177

Nitrogen compounds

178

Arc or spark discharge

179

Nitrogen oxides

450

Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere

451

Capillary electrophoresis

452

With detailed detection

453

With injection

454

With adjustment or alteration of electro-osmotic bulk flow

455

Using gel-filled capillary

456

Gel electrophoresis

457

With programmed, cylic, or time responsive control

458

Plural rapid changes in direction of electric field (at least 1,000 times total and at more than 1/sec) (e.g., pulsed field, etc.)

459

Isoelectric focusing (i.e., using pH variation)

461

With analysis or detailed detection

462

With posttreatment of gel to purify or recover a desired component

463

Destaining

464

Blotting

465

Preparation in unitary apparatus (e.g., preparative, etc.)

466

Using slab gel

467

Vertical or inclined

468

Electrolyte composition

469

Gel composition (other than simple agarose or polyacrylamide)

470

Including manufacture or preparation (e.g., molding, gelation, etc.)

471

Coating or forming of object

472

With control responsive to sensed condition

473

Temperature sensed

474

Current sensed

475

Rubber or vulcanizable gum used to coat or form

476

Sheet, web, wire, or filament of indeterminant length formed or coated

477

Alternating current

478

With irradiation or illumination (e.g., for curing, etc.)

479

Coating interior of object

480

With regeneration or replenishment of coating bath (e.g., ultrafiltration, ion exchange, measurement followed by addition of concentrated reagent, etc.)

481

Using ion exchange material

482

Using filter or membrane

483

Forming of object

484

Plural coating operations

485

Using mask

486

Including nonelectrophoretic coating

487

With heat treatment of a coated layer (e.g., curing, sintering, etc.)

488

Organic (e.g., curing thermoset resin, etc.)

489

Using bath having designated chemical composition (DCC)

490

Resultant coating is solely inorganic

491

With heat treatment of coating

492

Anodic processes only

493

With heat treatment of coating

494

And washing, rinsing, or drying of coating

495

With pretreatment of substrate or bath

496

Bath contains shading or coloring agent (e.g., pigment, etc.)

497

Bath contains surface active agent (e.g., soap or detergent, wetting or emulsifying agent, etc.)

498

Bath contains carboxyl group

499

Cathodic processes only

500

With heat treatment of coating

501

Bath contains epoxy or epoxide

502

Bath contains epoxy or epoxide

503

And shading or coloring agent

504

And separate crosslinking or curing agent

505

Isocyanate

506

Bath contains separate crosslinking or curing agent

507

With posttreatment of coating (e.g., heat treatment, washing, drying, etc.)

508

Bath contains shading or coloring agent, metal oxide, free metal, or free carbon

509

With heat treatment of coating

510

With pretreatment of substrate (e.g., cleaning, wetting, etc.)

511

Using liquid jet

512

Continuous movement of substrate through bath

513

Hydrocarbon oil separated or purified

514

Aqueous system

515

Inorganic siliceous or calcareous material prepared, separated, or treated (e.g., clay, earth, concrete, asbestos, glass, etc.)

516

Barrier separation (e.g., using membrane, filter paper, etc.)

517

Ion selective

518

Barrier separation (e.g., using membrane, filter paper, etc.)

519

With control responsive to sensed condition

520

Ion selective

521

Combined with manufacture or pretreatment of barrier

522

Using both anion and cation selective membranes

523

Alternating anion and cation selective membranes

524

And using ion exchange material (e.g., suspended particles, etc.)

525

With prevention of scale buildup or fouling of membrane

526

Gas or vapor treated

527

Biological material prepared, recovered, or treated (e.g., urine, etc.)

528

Regeneration of liquid electrolyte

529

Metal or metal salt recovered or removed

530

Organic material prepared, recovered, or treated

531

Acid prepared, recovered, or treated

532

And using nonion selective membrane

533

And using ion exchange material (e.g., suspended particles, etc.)

534

And using bipolar membrane

535

And using nonion selective membrane

536

And using ion exchange material (e.g., suspended particles, etc.)

537

Using bipolar membrane

538

Water splitting

539

Using anion selective membrane

540

Biological material prepared, recovered, or treated (e.g., urine, etc.)

541

Organic material prepared, recovered, or treated

542

Combined with diverse-type separation (e.g., electro-osmotic barrier separation combined with centrifugal separation, etc.)

543

Biological material prepared, recovered, or treated (e.g., urine, etc.)

544

Organic material prepared, recovered, or treated

545

With use of nonelectrical field or force to separate (e.g., magnetic, centrifugal, etc.)

546

Absorbent strip electrophoresis (e.g., using cellulose acetate or paper strip, etc.)

547

Dielectrophoresis (i.e., using nonuniform electric field)

548

Isoelectric focusing (i.e., using pH variation)

549

Isotachophoresis (i.e., displacement electrophoresis) or measurement of ion or particle mobility

550

Ionophoresis

551

Solid sorption or desorption

553

Bulk separation of solids and liquids (e.g., dewatering solids, clarifying water, etc.)

554

Electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation)

555

With control responsive to sensed condition

556

With measuring, testing, or sensing

557

Using magnetic field

558

With simultaneous use of liquid-liquid extraction solvent

559

Predominantly hydrocarbon

560

Removing solids

561

With addition of agent to facilitate removal

562

Using cohesive filter or solid packing

563

Resolving emulsion or dispersion

564

Using interrupted or pulsed direct current field

565

Using modified alternating current (other than standard 50 Hz or 60 Hz sine wave) field

567

Using modifying agent

568

Gas or vapor

569

Dielectric liquid

570

Water

571

Removing solids

572

Using cohesive filter or solid packing

573

Resolving emulsion or dispersion

192.1

Coating, forming or etching by sputtering

192.11

Ion beam sputter deposition

192.12

Glow discharge sputter deposition (e.g., cathode sputtering, etc.)

192.13

Measuring or testing (e.g., of operating parameters, property of article, etc.)

192.14

Coating inorganic material onto polymeric material

192.15

Specified deposition material or use

192.16

Wear or abrasion resistant

192.17

Electrical contact material

192.18

Piezoelectric

192.2

Ferromagnetic

192.21

Resistor

192.22

Insulator or dielectric

192.23

Silicon containing

192.24

Superconductor

192.25

Semiconductor

192.26

Optical or photoactive

192.27

Reflective

192.28

Absorptive

192.29

Transparent conductor

192.3

With sputter etching

192.32

Sputter etching

192.33

Measuring or testing (e.g., of operating parameters, end point determination, etc.)

192.34

Ion beam etching (e.g., ion milling, etc.)

192.35

Etching specified material

192.36

Organic

192.37

Silicon containing

192.38

Vacuum arc discharge coating

193

APPARATUS

194

Electrolytic

400

Analysis and testing

401

Fault testing of sensor or component

402

Regeneration or activation

403.01

Biological material (e.g., microbe, enzyme, antigen, etc.) analyzed, tested, or included in apparatus

403.02

Disposable apparatus or apparatus having removable section (e.g., removable cartridge, etc.)

403.03

Plural measuring sections or zones

403.04

Enzyme included in apparatus

403.05

With semipermeable membrane

403.06

With semipermeable membrane

403.07

For blocking passage of macromolecules (molecular weight greater than or equal to 8,000)

403.08

Lipid included in apparatus

403.09

Enzyme included in apparatus

403.1

Enzyme included in apparatus

403.11

Glucose oxidase

403.12

With diverse enzyme or catalyst (e.g., bienzyme or coenzyme system, glucose oxidase with Pt catalyst, etc.)

403.13

And microelectrode (i.e., at least one electrode dimension is less than 500 microns)

403.14

Enzyme included in apparatus

403.15

Electrode containing free carbon

404

Corrosion

405

Titration

406

With significant electrical circuitry or nominal computer device

407

With significant display or analytical device

408

With means for temperature or pressure compensation

409

With means providing specified-flow condition or flow-path

410

Solid electrolyte means

411

Three or more electrodes

412

Three or more electrodes

413

Liquid electrode, e.g., Hg, Na, etc.

414

Gel electrolyte

415

Selectively permeable membrane

416

Ion-sensitive electrode

417

Liquid ion-exchanger

418

Organic membrane

419

Inorganic membrane

420

Glass ion-selective membrane

421

Solid electrolyte

422

Liquid sample sensor

423

With fugitive protective element

424

Gas sample sensor

425

With impressed current means

426

Planar electrode surface

427

With gas reference material

428

With protective element

429

Protective element is a layer

430

Moisture absorbing electrolyte

431

Gas sensing electrode

432

With gas diffusion electrode

433

Measuring carbon or pH

434

Involving plating, coating or stripping

435

Standard reference electrode

196.01

Object protection

196.02

With control means responsive to sensed condition

196.03

And programmed, cyclic, or time responsive control means

196.04

Internal battery

196.05

With programmed, cyclic, or time responsive control means

196.06

With measuring, testing, or sensing means

196.07

Internal battery

196.08

With gas or vapor removing or treating means

196.09

Plural cells used or protected

196.1

Internal battery

196.11

Resistor or impedance in series between anode and object

196.12

With fluid filter

196.13

With bypass means

196.14

Anode moving relative to object

196.15

With fluid inlet or outlet means used or protected

196.16

Dielectric coating, casing, or section

196.17

Rigid anode with rigid support

196.18

More than half of anode is or has coating, covering, or shield

196.19

Dielectric coating, covering, or shield

196.2

Flexible cable, chain, or wire anode or support

196.21

Earth grounded object or protection means

196.22

Copper and zinc electrically coupled or alloyed into one or more electrodes

196.23

Anode contains aluminum

196.24

And magnesium

196.25

And zinc

196.26

Resistor or impedance in series between power supply and object

196.27

Alternative energy supply (e.g., solar panel, thermoelectric or piezoelectric power supply, etc.)

196.28

Rotating electrode

196.29

Magnetic mounting means

196.3

Rigid anode with rigid support

196.31

Threaded coupling for rigid anode or rigid support

196.32

Dielectric thread

196.33

Flexible cable, chain, or wire anode or support

196.34

Plural anode sections on single cable, chain, or wire

196.35

Helically wound

196.36

Earth grounded object or protection means

196.37

Vessel protected (e.g., steam boiler, etc.)

196.38

Anode contains precious metal or free carbon

With movable electrode means

198

Work conveyer

199

Rotary

200

With base treatment

201

Loose article

202

Endless

203

With base treatment

204

With current control

205

With current control

206

Continuous strip or filament electrode

207

With base treatment

208

Stripping

209

Mechanical working

210

Heat treatment means

211

With current control

212

Rotary

213

Barrels and rotary receptacles

214

Swinging or tilting receptacles

215

With base treatment

216

Stripping

217

Mechanical working

218

With current control

219

Liquid electrode

220

With electrode recirculation means

221

With oscillator, reciprocator or agitator

222

Electrode oscillator, reciprocator or agitator

223

With current control

224R

Localized area applicators

224M

Electrochemical machining

225

Electrode feeding or withdrawal means

226

With base treatment

227

Cells with base treatment means

228.1

With current, voltage, or power control means responsive to sensed condition

228.2

Fluid level sensing means

228.3

Fluid flow sensing means

228.4

Fluid pressure sensing means

228.5

Gaseous fluid

228.6

Electrolyte property sensing means (e.g., temperature, concentration, pH, conductivity, etc.)

228.7

Workpiece property sensing means (e.g., mass, coating thickness, etc.)

228.8

Workpiece presence, position, or movement sensing means

228.9

Having auxiliary electrode

229.1

Reference electrode as or with auxiliary electrode

229.2

And programmed, cyclic, or time responsive control means

229.3

For controlling waveform supplied to working electrode

229.4

With programmed, cyclic, or time responsive current, voltage, or power control means

229.5

For controlling waveform supplied to working electrode

229.6

For simultaneously reversing polarity of working and counter electrodes

229.7

Having specified circuit details

229.8

With means for measuring, testing, or sensing current, voltage, or power

229.9

Having auxiliary electrode

230.1

Reference electrode as or with auxiliary electrode

230.2

With current, voltage, or power control means

230.3

Mechanical

230.4

For inhibiting short circuits

230.5

Switch or connector

230.6

For controlling waveform

230.7

Having auxiliary electrode

230.8

Having specified circuit details

232

Cells with electrolyte treatment means

233

Leacher, dissolver or extractor

234

Recirculation

235

With filter

236

With heater or cooler

237

Recirculation

238

With filter

239

With heater or cooler

240

With filter

241

With heater or cooler

242

Cells

243.1

Fused bath

244

Plural cells

245

With feeding and/or withdrawal means

246

Gas feeding

247

Gas withdrawal

247.1

With magnetic field effect compensating means

247.2

With means for cleaning electrode element

247.3

Refractory hard material (RHM) containing electrode

247.4

With cell lining or coating

247.5

Thermal effect compensating means

248

Internal battery

249

Filter or loose electrode type

250

Liquid electrode

251

Diaphragm type

252

Diaphragm type

253

Plural cells

254

Bipolar electrode

255

With feeding and/or withdrawal means

256

Gas

257

With feeding and/or withdrawal means

258

Gas

259

Basket-type electrode

260

Concentrically arranged electrodes

261

With agitator

262

With heater or cooler

263

With feeding and/or withdrawal means

264

And filter

265

Gas feeding

266

Gas withdrawal

267

Plural cells

268

Bipolar electrode

269

With feeding and/or withdrawal means

270

Gas

271

Portable

272

Concentrically arranged electrodes

273

With agitator

274

With heater or cooler

275.1

With feeding and/or withdrawal means

[See the Search Notes for FOR Collections associated with this subclass or its indents (if there are indents).]
	276	And filter

277

Gas feeding

278

Gas withdrawal

278.5

Parallel plate type electrodes

279

Elements

280

Electrodes

281

Electroforming molds or strips plates

282

With diaphragm

283

Perforated or foraminous electrode

284

Perforated or foraminous

285

Work holder

286.1

With electrode supporting means

[See the Search Notes for FOR Collections associated with this subclass or its indents (if there are indents).]
	287	Work container

288

Electrodes with lateral extensions

288.1

And dielectric gasket or spacer

288.2

And additional electrical conductor of diverse material

288.3

Including resilient means (e.g., spring, etc.)

288.4

Including threaded connector

288.5

Having wedge or tapered tightening means

288.6

Hook or loop

289

With lateral extensions

290.01

Laminated or coated (i.e., composite having two or more layers)

[See the Search Notes for FOR Collections associated with this subclass or its indents (if there are indents).]
	290.02	Actinide series element (i.e., Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, or Lr) or compound containing

290.03

Having three or more layers

290.04

Rare earth metal (i.e., Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu) or compound containing

290.05

Organic compound containing

290.06

And noble metal (i.e., Ru, Rh, Pd, Os, Ir, Pt, Ag, or Au) or compound containing

290.07

And free carbon containing

290.08

Noble metal (i.e., Ru, Rh, Pd, Os, Ir, Pt, Ag, or Au) or compound containing

290.09

Plural metal oxides containing

290.1

Rare earth metal (i.e., Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu) or compound containing

290.11

Organic compound containing

290.12

Refractory metal (i.e., Ti, V, Cr, Zr, Nb or Cb, Mo, Hf, Ta, or W) or compound containing

290.13

Surface layer contains electrolytically exposed refractory metal or compound

290.14

Noble metal (i.e., Ru, Rh, Pd, Os, Ir, Pt, Ag, or Au) or compound containing

290.15

Free carbon containing

291

Composition

292

Metallic

293

Alloys

294

Carbon containing

295

Diaphragms

296

Organic

297.01

Electrode support or work holder

[See the Search Notes for FOR Collections associated with this subclass or its indents )if there are indents).]
	297.02	Magnetic support

297.03

Vacuum support

297.04

Float or buoyant support

297.05

Mask for workpiece

297.06

Workpiece rack

297.07

Adjustable

297.08

Mechanized

297.09

Including resilient means (e.g., spring, etc.)

297.1

Including resilient means (e.g., spring, etc.)

297.11

Porous enclosure

297.12

Grid or grating

297.13

Including threaded connector

297.14

Including resilient means (e.g., spring, etc.)

297.15

Including threaded connector

297.16

Hook or loop

298.01

Coating, forming or etching by sputtering

298.02

Coating

298.03

Measuring, analyzing or testing

298.04

Ion beam sputter deposition

298.05

Ion plating

298.06

Triode, tetrode, auxiliary electrode or biased workpiece

298.07

Specified gas feed or withdrawal

298.08

Specified power supply or matching network

298.09

Specified cooling or heating

298.11

Specified mask, shield or shutter

298.12

Specified target particulars

298.13

Target composition

298.14

Specified anode particulars

298.15

Specified work holder

298.16

Magnetically enhanced

298.17

Flux passes through target surface

298.18

Focusing target (e.g., conical target, plural inclined targets, etc.)

298.19

Planar magnetron

298.2

Moving magnetic field or target

298.21

Cylindrical or curved magnetron target

298.22

Moving magnetic field or target

298.23

Moving workpiece or target

298.24

Indeterminate length moving workpiece

298.25

Multi-chamber (e.g., including air lock, load/unload chamber, etc.)

298.26

Plural diverse treatment stations, zones, or coating material source within single chamber

298.27

Plural modes of movement (e.g., planetary, epicyclic, etc.)

298.28

Rotational movement

298.29

Oscillatory movement

298.31

Etching

298.32

Measuring, analyzing or testing

298.33

Specified gas feed or withdrawal

298.34

Auxiliary electrode, bias means or specified power supply

298.35

Multi-chamber, load/unload means or moving workpiece

298.36

Beam or directed flux etching (e.g., ion beam, etc.)

298.37

Magnetically enhanced

298.38

Microwave excitation

298.39

Plural parallel plates (e.g., desmearing reactor, etc.)

298.41

Vacuum arc discharge coating

600

Electrophoretic or electro-osmotic apparatus

601

Capillary electrophoresis type

602

With control means responsive to sensed condition

603

With detailed detection system (e.g., including a light source and a camera, etc.)

604

With injector

605

Gel filled

606

Gel electrophoresis type

607

With control means responsive to sensed condition

608

With programmed, cyclic, or time responsive control means

609

Plural rapid changes in direction of electric field (at least 1,000 times total and at more than 1/sec) (e.g., pulsed field, etc.)

610

Isoelectric focusing (i.e., uses pH variation)

612

With detailed detection system (e.g., including a light source and a camera, etc.)

613

With means for posttreatment of gel to purify or recover a desired component

614

Blotter (e.g., membrane, etc.)

615

Unitary preparation apparatus (e.g., preparative means, etc.)

616

Slab gel

617

Curved

618

Vertical or inclined

619

With gel shaping or molding means (e.g., comb, ribbed insert, gel injectors, etc.)

620

With gel shaping or molding means (e.g., comb, ribbed insert, gel injectors, etc.)

621

With liquid heat exchange means to cool gel slab during electrophoresis

622

Coating or forming means

623

With moving or movable electrode

624

And means for posttreatment of coating (e.g., drying, heating, curing, etc.)

625

Coating interior of object or article (e.g., water main, automobile body, etc.)

626

With means for regeneration or replenishment of coating bath or electrolyte

627

Barrier separator (e.g., electrodialyzer, etc.)

628

With control means responsive to sensed condition

629

With moving or movable electrode

630

Ion selective

631

With bipolar membrane

632

And ion exchange material (e.g., suspended ion exchange resin particles, etc.)

633

Both anion and cation selective membranes

634

Alternating anion and cation selective membranes

635

Tortuous path-type frame or membrane spacer

636

With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

637

And nonion selective membrane

638

With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

639

With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

640

Cylindrical barrier (e.g., filter, membrane, etc.)

641

Absorbent strip (e.g., cellulose acetate, paper strip, etc.) type

642

Movable strip

643

Dielectrophoretic (i.e., uses nonuniform electric field)

644

Isoelectric focusing (i.e., uses pH variation)

645

Isotachophoretic (i.e., displacement electrophoretic) or means to measure ion or particle mobility

647

Particle bed separator (e.g., inert particles, ion exchange beads, etc.)

648

Bulk separator for solids and liquids (e.g., to dewater solids, clarify water, etc.)

649

With moving or movable electrode

650

With moving or movable electrode

660

Apparatus for electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation)

661

With control means responsive to sensed condition

662

Liquid level sensing means

663

With programmed, cyclic, or time responsive control means

664

With magnetic separating means

665

With filter (e.g., electrostatic filter, etc.)

666

Plural separate treatment chambers or zones

667

Probe type

668

With moving or movable electrode

669

Rotating or rotatable

670

Concentric electrodes

671

Cylindrical or annular

672

Parallel plate-type electrodes

673

Vertical flat plates

674

Porous, perforated, or grid electrode

900

EFFECTING A CHANGE IN ISOMERIZATION BY WAVE ENERGY

901

EFFECTING A COLOR CHANGE BY WAVE ENERGY

902

PRODUCTION OF DESIRED COMPOUND BY WAVE ENERGY IN PRESENCE OF A CHEMICALLY DESIGNATED NONREACTANT CHEMICAL TREATING AGENT (EXCLUDING WATER, CHLOROFORM, CARBON TETRACHLORIDE, METHYLENE CHLORIDE OR BENZENE)

903

Inorganic chemical treating agent

904

Metal treating agent

905

Heavy metal agent

907

Silicon or boron treating agent

908

Phosphorus treating agent

909

Heavy metal treating agent

910

Sulfur treating agent

911

Nitrogen treating agent

912

Oxygen treating agent

913

Peroxide agent

914

Only carbon, hydrogen or halogen atom in treating agent

FOR921

Internal battery (204/197)

FOR923

With fluid pressure, flow, or level intercontrol (204/229)

FOR924

Gaseous fluid (204/230)

FOR925

Auxiliary electrode (204/231)

FOR927

Bath current distribution, magnetic field control (204/243 M)

FOR933

Dielectric film-forming metal base, insoluble conductive coating (204/290 F)

FOR935

Workpiece held by magnetism or suction (204/297 M)

FOR936

Workpiece rack (204/297 W)

Electrolytic (204/194)

Analysis and testing (204/400)

FOR937

Biological, e.g., microbe, enzyme, antigen, etc. (204/403)

DIG3

AUXILIARY INTERNALLY GENERATED ELECTRICAL ENERGY

DIG4

ELECTROLYSIS CELL COMBINED WITH FUEL CELL

DIG5

MAGNETIC PLUS ELECTROLYTIC

DIG6

UNUSUAL NON-204 USES OF ELECTROLYSIS

DIG7

CURRENT DISTRIBUTION WITHIN THE BATH

DIG8

AC PLUS DC

DIG9

WAVE FORMS

DIG12

ELECTROCHEMICAL MACHINING

DIG13

PURIFICATION AND TREATMENT OF ELECTROPLATING BATHS AND PLATING WASTES

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