US PATENT SUBCLASS 252 / 519.4
.~.~ Sulfur, selenium, or tellurium containing

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

500  DF  ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS {6}
518.1  DF  .~ Metal compound containing {16}
519.4.~.~ Sulfur, selenium, or tellurium containing

DEFINITION

Classification: 252/519.4

Sulfur, selenium, or tellurium containing:

(under subclass 518.1) Compositions wherein sulfur, selenium, or tellurium is present in the metal compound.