Photochromic article
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United States of America Patent
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-
Mar 20, 1990
Issued Date -
N/A
app pub date -
Dec 6, 1988
filing date -
Sep 26, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Described are photochromic spiro(indoline)benzoxazine compounds having substituents on the benzoxazine portion of the compound, and their use in plastic hosts to impart a photochromic response thereto.
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