Photochromic spironaphthopyran compounds

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United States of America Patent

PATENT NO 5679805
SERIAL NO

08477138

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Abstract

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A naphthopyran compound represented by the formula: ##STR1## wherein A and B are each selected from the following group: a substituted divalent cyclic radical, a substituted divalent aromatic radical, and a substituted divalent fused heterocyclic radical.

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Patent Owner(s)

  • INSIGHT EQUITY A.P. X, LP

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hughes, Frank J Edina, MN 16 161

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