US PATENT SUBCLASS 216 / 97
.~.~ Substrate is glass

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

83  DF  NONGASEOUS PHASE ETCHING OF SUBSTRATE {9}
96  DF  .~ Etching inorganic substrate {3}
97.~.~ Substrate is glass {1}
98  DF  .~.~.~> Frosting glass

DEFINITION

Classification: 216/97

Substrate is glass:

(under subclass 96) Process wherein at least one of the layers of the substrate contains glass material.

(1) Note. See Glossary for a definition of the term Glass.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

31, for etching or leaching of glass preform, during manufacturing of a glass preform as per Class 65 definition.