US PATENT SUBCLASS 501 / 906
.~.~ Thorium oxide containing

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
900  DF  .~ Optical glass (e.g., silent on refractive index and/or Abbe number) {6}
906.~.~ Thorium oxide containing

DEFINITION

Classification: 501/906

Thorium oxide containing:

Optical glasses which comprise thorium oxide (ThO2).