US PATENT SUBCLASS 428 / 64.6
.~.~.~.~ Protective layer

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

64.1  DF  CIRCULAR SHEET OR CIRCULAR BLANK {8}
64.2  DF  .~ Recording medium or carrier {5}
64.4  DF  .~.~ Optical recording medium or carrier {5}
64.5  DF  .~.~.~ Tellurium containing {1}
64.6.~.~.~.~ Protective layer

DEFINITION

Classification: 428/64.6

Protective layer:

(under subclass 64.5) Subject matter wherein the tellurium containing recording medium or carrier is covered by a resistant layer; e.g., resistant to heat, cold, oxidation, pollution, etc.