Compositions – Light transmission modifying compositions – Displaying color change
Reexamination Certificate
2005-03-08
2005-03-08
Tucker, Philip C. (Department: 1712)
Compositions
Light transmission modifying compositions
Displaying color change
C351S163000, C549S389000, C548S525000
Reexamination Certificate
active
06863843
ABSTRACT:
A photochromic [1,2-b] naphthopyran having a fluoro substituent in at least one of the 7-position or the 9-position of the naphthopyran provides a stable photochromic compound with a narrow range of absorption. A preferred photochromic naphthopyran has the 2-position of the naphthopyran with two aromatic substituents thereon. It is further preferred to have at least one 2-position aromatic substituent comprising a phenyl group. The photochromic naphthopyran may also have at least one 2-position aromatic substituent comprise a phenyl group having one substituent selected from the group consisting of an anthranilyl, azepinyl, benzoxazolyl, dialkylamino, diazepinyl, diazolyl, imidazolidinyl, imidazolyl, imidazolinyl, indazolyl, indo eninyl, indolinyl, indolizinyl, indolyl, indoxazinyl, isobenzazolyl, isoindolyl, isooxazolyl, isooxazyl, isopyrrol, isoquinolyl, isothiazolyl, julolideno, morpholino, morpholinyl, oxadiazolyl, oxathiazolyl, oxathiazyl, oxathiolyl, oxatriazolyl, oxazolyl, piperazinyl, piperazyl, piperidyl, purinyl, pyranopyrrolyl, pyrazinyl, pyrazolidinyl, pyrazolinyl, pyrazolyl, pyrazyl, pyridazinyl, pyridazyl, pyridyl, pyrimidinyl, pyrimidyl, pyridenyl, pyrrolidinyl, pyrrolinyl, pyrroyl, quinolizinyl, quinocyclidinyl, quinolyl, thiazolyl, triazolyl and triazyl group.
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Hughes Frank J.
Ippoliti J. Thomas
Qin Xuzhi
Mark A. Litman & Associates P.A.
Tucker Philip C.
Vision--Ease Lens, Inc.
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