Photochromic glasses

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United States of America Patent

PATENT NO 6162749
SERIAL NO

09355519

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention concerns photochromic glasses with improved properties having the following composition, in wt. %: SiO.sub.2 : 51-66, B.sub.2 O.sub.3 : 15-23, Al.sub.2 O.sub.3 : 3-10, ZrO.sub.2 : 2.5-11, TiO.sub.2 : 0-1, Li.sub.2 O: 3-7, Na.sub.2 O: 0-8, K.sub.2 O: 2-9, Ag: 0.080-0.30, CuO>0.0020-0.0130, Cl: 0.1-0.6, Br 0.040-0.3, MgO: 0-3, CaO: 0-3, SrO: 0-3, BaO: 0-3, Nb.sub.2 O.sub.5 : 0-1, La.sub.2 O.sub.3 : 0-8, Y.sub.2 O.sub.3 : 0-8, with 0.20.15, 0.5.ltoreq.La.sub.2 O.sub.3 +Y.sub.2 O.sub.3.ltoreq.8, TiO.sub.2 +Nb.sub.2 O.sub.5 .ltoreq.1.2, 10.ltoreq.Al.sub.2 O.sub.3 +ZrO.sub.2 .ltoreq.17, MgO+CaO+SrO+BaO.ltoreq.6. Use for the production of ophthalmic lenses.

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Patent Owner(s)

Patent OwnerAddress
CORNING S A77210 AVON

International Classification(s)

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  • 1999 Application Filing Year
  • C03C Class
  • 279 Applications Filed
  • 143 Patents Issued To-Date
  • 51.26 % Issued To-Date

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brocheton, Yves Andre Henri Fontenay-sous-Bois, FR 12 98
Prassas, Michel Vulaines S/Seine, FR 32 407

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  • 10 Citation Count
  • C03C Class
  • 0.35 % this patent is cited more than
  • 25 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges11116643241665222501 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 8081 - 9091 - 100100 +05101520253035404550556065707580859095100105110115120

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