Diaryl-2H-naphthopyrans

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United States of America Patent

PATENT NO 6190580
SERIAL NO

09447233

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Abstract

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Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their special structure, have a reduced tendency of the molecules to migrate in plastics.

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Patent Owner(s)

Patent OwnerAddress
RODENSTOCK GMBHELSENHEIMERSTR 33 MÜNCHEN 80687

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Melzig, Manfred Wessling, DE 42 566
Zinner, Herbert Taufkirchen, DE 17 204

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