US Patent Class 204
CHEMISTRY: ELECTRICAL AND WAVE ENERGY-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
*  DF  PROCESSES AND PRODUCTS {7}
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*Note: See subclasses .......*
*900-914 for art collections.*
*pertaining to subclasses....*
*157.15-158.21. .............*
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193  DF  APPARATUS {5}
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CROSS-REFERENCE ART COLLECTIONS RELATING TO SUBCLASSES 157.15 - 158.21
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900  DF  EFFECTING A CHANGE IN ISOMERIZATION BY WAVE ENERGY
901  DF  EFFECTING A COLOR CHANGE BY WAVE ENERGY
902  DF  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) {8}
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FOREIGN ART COLLECTIONS
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FOR 920  DF  ELECTROLYTIC OBJECT PROTECTION APPARATUS (204/196) {1}
FOR 922  DF  ELECTROLYTIC CELLS WITH CURRENT CONTROL MEANS (204/228) {2}
FOR 926  DF  ELECTROLYTIC FUSED BATH CELLS (204/243 R) {1}
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DIGESTS
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DIG 3  DF  Auxiliary internally generated electrical energy
DIG 4  DF  Electrolysis cell combined with fuel cell
DIG 5  DF  Magnetic plus electrolytic
DIG 6  DF  Unusual non-204 uses of electrolysis
DIG 7  DF  Current distribution within the bath
DIG 8  DF  AC plus DC
DIG 9  DF  Wave forms
DIG 12  DF  Electrochemical machining
DIG 13  DF  Purification and treatment of electroplating baths and plating wastes