.~ Optical glass (e.g., silent on refractive index and/or Abbe number) {6}
903
.~.~ Having refractive index less than 1.8 and Abbe number less than 70
DEFINITION
Classification: 501/903
Having refractive index less than 1.8 and abbe number less than 70:
This subclass takes cross-reference copies of patents which are originals in the above enumerated subclasses disclosing an optical glass composition or method of making same having a refractive index of less than 1.8 and an Abbe number of less than 70.
