Photochromic spiro(indoline) fluoranthenoxazine compounds
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United States of America Patent
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Sep 15, 1998
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N/A
app pub date -
Oct 1, 1997
filing date -
Oct 1, 1997
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Abstract
Described are novel photochromic spiro(indoline) fluoranthenoxazine compounds having certain substituents on the 1 and 3 positions of the indoline portion of the compounds and which may be represented by the following graphic formula: ##STR1## Also described are polymeric organic host materials that contain or that are coated with such compounds.
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