Fluorophosphate optical glass

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United States of America Patent

PATENT NO 4990468
SERIAL NO

07414385

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Abstract

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A fluorophosphate optical glass having optical constants, i.e. refractive index (nd) of 1.54 to 1.60 and Abbe number (.nu.d) of 68 to 75 and having abnormal partial dispersion represented by a relative partial dispersion of at least 0.537 is provided, which has a chemical composition (% by weight) comprising:

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Patent Owner(s)

Patent OwnerAddress
SUMITA OPTICAL GLASS INC 1-28 KANDA SUDA-CHO CHIYODA-KU TOKYO JAPANNot Provided

International Classification(s)

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  • 1989 Application Filing Year
  • C03C Class
  • 296 Applications Filed
  • 3 Patents Issued To-Date
  • 1.02 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920200255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Komiya, Masayuki Yono, JP 6 82
Nagahama, Shinobu Kasukabe, JP 19 200
Otsuka, Masaaki Yono, JP 17 110
Sawanobori, Naruhito Yono, JP 25 709

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  • 17 Citation Count
  • C03C Class
  • 0 % this patent is cited more than
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