US PATENT SUBCLASS 205 / 647
.~.~ Including nonelectrolytic erosion

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

640  DF  ELECTROLYTIC EROSION OF A WORKPIECE FOR SHAPE OR SURFACE CHANGE (E.G., ETCHING, POLISHING, ETC.) (PROCESS AND ELECTROLYTE COMPOSITION) {19}
646  DF  .~ With programmed, cyclic, or time responsive control {5}
647.~.~ Including nonelectrolytic erosion

DEFINITION

Classification: 205/647

Including nonelectrolytic erosion:

(under subclass 646) Process which includes both electrolytic and nonelectrolytic removal of material from the workpiece.

(1) Note. The nonelectrolytic erosion may be carried out either simultaneously with the electrolytic erosion or as a separate step.

SEE OR SEARCH THIS CLASS, SUBCLASS:

661, for electrolytic erosion with preliminary nonelectrolytic cleaning or shaping of the workpiece; but without programmed, cyclic, or time responsive control.

662+, for electrolytic erosion with mechanical abrasion or grinding, in general.

709, for electrolytic cleaning involving moving contact of a solid member with a workpiece.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy, 280+, for electrode structure and compositions used in electrolysis, including those also having a nonelectrolytic action.

216, Etching a Substrate: Processes, appropriate subclasses for a combination process of Class 205 electrolytic erosion followed by a Class 216 chemical etching step. See section III of the class definition for Class 204 for an elaboration of the class line.