US PATENT SUBCLASS 501 / 902
.~.~ Having Abbe number at least 70

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}
902.~.~ Having Abbe number at least 70

DEFINITION

Classification: 501/902

Having abbe number at least 70:

This subclass takes cross-reference of patents which are originals in subclasses enumerated above disclosing an optical glass composition or method of making same having an Abbe number of at least 70.