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Peter G. Piusz
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Longmeadow, MA, US
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last 30 patents
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Patent Grant
Photochromic compounds
Patent number
4,342,668
Issue date
Aug 3, 1982
American Optical Corporation
Richard J. Hovey
C07 - ORGANIC CHEMISTRY
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Patent Grant
Photochromic compounds
Patent number
4,215,010
Issue date
Jul 29, 1980
American Optical Corporation
Richard J. Hovey
C07 - ORGANIC CHEMISTRY
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Patent Grant
Photochromic mercury complexes of asymmetrical diarylthiocarbazones
Patent number
4,170,567
Issue date
Oct 9, 1979
American Optical Corporation
Nori Y. C. Chu
G02 - OPTICS
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Patent Grant
Silver halide activated photochromic plastics
Patent number
4,049,567
Issue date
Sep 20, 1977
American Optical Corporation
Nori Y. C. Chu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY