US PATENT SUBCLASS 501 / 900
.~ Optical glass (e.g., silent on refractive index and/or Abbe number)

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

1  DF  CERAMIC COMPOSITIONS {15}
900.~ Optical glass (e.g., silent on refractive index and/or Abbe number) {6}
901  DF  .~.~> Having R.I. at least 1.8
902  DF  .~.~> Having Abbe number at least 70
903  DF  .~.~> Having refractive index less than 1.8 and Abbe number less than 70
904  DF  .~.~> Infrared transmitting or absorbing
905  DF  .~.~> Ultraviolet transmitting or absorbing
906  DF  .~.~> Thorium oxide containing

DEFINITION

Classification: 501/900

Optical glass (e.g., silent on refractive index and/or abbe number):

Cross-reference copies of original patents in the above enumerated subclasses which disclose optical glass compositions wherein neither the refractive index nor the Abbe number is disclosed.

(1) Note. Disclosures of optical glass compositions reciting a refractive index or Abbe number are cross-referenced in the indented subclasses 901 through 906.