Photochromic compounds

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United States of America Patent

PATENT NO 4215010
SERIAL NO

05940535

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Photochromic compounds of the formula ##STR1## wherein one of R.sub.1 and R.sub.2 is halogen or lower alkoxy, and the other is hydrogen, and R.sub.3 and R.sub.4 are hydrogen, lower alkyl, lower alkoxy, or halogen and their use in lenses are disclosed.

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Patent Owner(s)

  • AMERICAN OPTICAL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chu, Nori Y C Southbridge, MA 8 757
Fuchsman, Charles H Bemidji, MN 2 353
Hovey, Richard J Sturbridge, MA 5 540
Piusz, Peter G Longmeadow, MA 2 353

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