Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1992-09-30
1993-12-28
Chan, Nicky
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549 60, 524110, 524109, 524 99, 351163, C07D31192, C08K 515, G02B 2700
Patent
active
052741320
ABSTRACT:
Described are novel reversible photochromic naphthopyran compounds, examples of which are 3-aryl-3-arylalkenyl naphthopyrans. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
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Chan Nicky
Stein Irwin M.
Transitions Optical Inc.
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