US PATENT SUBCLASS 216 / 56-- ETCHING TO PRODUCE POROUS OR PERFORATED ARTICLE

US PATENT SUBCLASS 216 / 56
ETCHING TO PRODUCE POROUS OR PERFORATED ARTICLE

Current as of: June, 1999
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216 /	HD	ETCHING A SUBSTRATE: PROCESSES

56		ETCHING TO PRODUCE POROUS OR PERFORATED ARTICLE

DEFINITION

Classification: 216/56

ETCHING TO PRODUCE POROUS OR PERFORATED ARTICLE:

(under the class definition) Process wherein the action of the etchant produces relatively small holes or channels throughout a substrate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12, for forming a mask used for a nonetching function.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

122, for pore forming.

521, Synthetic Resins or Natural Rubbers,

50+, for cellular products or processes of preparing a cellular product.