US Patent No: 4,637,698

Number of patents in Portfolio can not be more than 2000

Photochromic compound and articles containing the same

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Abstract

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Photochromic compounds represented by the graphic formula: ##STR1## wherein: (a) R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.8 alkyl, phenyl, phen(C.sub.1 -C.sub.4) alkyl, allyl and mono- and di-substituted phenyl, said substituents being selected from C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.5 alkoxy; (b) R.sub.2 and R.sub.3 are each selected from the group consisting of C.sub.1 -C.sub.5 alkyl, phenyl, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.5 alkoxy mono- and disubstituted phenyl, benzyl or combined to form a cyclic ring selected from the group consisting of an alicyclic ring containing from 6 to 8 carbon atoms (including the spiro carbon atom), norbornyl and adamantyl, and (c) R.sub.4 and R.sub.5 are each selected from the group consisting of hydrogen, C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy, nitro, cyano and C.sub.1 -C.sub.8 alkoxycarbonyl are described. Solvent systems which form photochromic compositions with the above compounds and articles containing the photochromic compound are described. The compound or compositions typically change from a colorless (nonexcited) or pale color, e.g., yellow, to blue after exposure to ultraviolet light.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PPG INDUSTRIES OHIO, INC.CLEVELAND, OH2291

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hurditch, Rodney J Providence, RI 10 311
Kwak, Won S Akron, OH 7 365

Cited Art Landscape

Patent Info (Count) # Cites Year
 
AMERICAN OPTICAL CORPORATION (2)
4,215,010 Photochromic compounds 136 1978
4,342,668 Photochromic compounds 136 1980
 
AO, INC. (1)
4,440,672 Photochromic composition resistant to fatigue 24 1982
 
SOLA INTERNATIONAL INC. (1)
4,289,497 Gradient photochromic lens and method selectively reducing photochromic activity 24 1980

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
PPG INDUSTRIES OHIO, INC. (46)
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4,909,963 Photochromic article 11 1988
4,931,221 Photochromic spiropyran compounds 50 1988
4,994,208 Photochromic polymeric article 59 1989
4,980,089 Photochromic spiropyran compounds 28 1989
5,066,818 Photochromic naphthopyran compounds 143 1990
5,021,196 Method for preparing variable-light transmittance article 14 1990
5,200,116 Photochromic chromene compounds 58 1990
5,244,602 Photochromic naphthopyrans 43 1990
5,288,877 Continuous process for preparing indolenine compounds 2 1991
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5,221,721 Polymerizable composition 9 1992
5,246,630 Polymerizable composition 7 1993
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5,739,243 Polymerizable composition 16 1996
5,917,006 Optical resin composition 14 1998
5,976,422 Optical resin composition 14 1998
5,942,158 One-component optical resin composition 15 1998
5,932,681 Method of preparing an optical polymerizate 17 1998
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6,077,921 Polymerizable polyol (allyl carbonate) compositions 3 1998
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6,316,570 Polymerizable composition of aliphatic polyol (allyl carbonate) 1 1999
6,342,571 High refractive index optical resin composition 21 1999
6,669,873 Optical resin composition comprising thiol-ene prepolymer 6 2000
6,262,211 Polymerizable polyol(allyl carbonate) composition 1 2000
6,506,864 Polymerizable composition of allyl functional monomers 1 2000
7,098,290 Method of preparing an optical polymerizate 4 2000
7,087,698 Method of preparing an optical polymerizate 0 2000
6,631,021 Polyfunctional thiirane compounds 7 2001
7,144,969 Impact resistant polyureaurethane and polyureaurethane prepolymer having low NCO/OH ratio 10 2002
7,214,754 Polymerizable polyol (allyl carbonate) compositions 1 2003
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8,017,720 Sulfur-containing oligomers and high index polyurethanes prepared therefrom 1 2005
8,734,951 Polyurethanes, articles and coatings prepared therefrom and methods of making the same 0 2006
8,653,220 Poly(ureaurethane)s, articles and coatings prepared therefrom and methods of making the same 0 2006
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8,399,559 Polyurethanes, articles and coatings prepared therefrom and methods of making the same 0 2006
8,349,986 Poly(ureaurethane)s, articles and coatings prepared therefrom and methods of making the same 0 2006
7,696,296 Compositions and articles prepared from the thioether functional oligomeric polythiols 0 2007
7,687,597 Thioether functional oligomeric polythiols and articles prepared therefrom 0 2007
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7,491,790 Sulfide-containing polythiols 0 2008
8,207,286 Methods for preparing polyurethanes 1 2009
 
TRANSITIONS OPTICAL, INC. (36)
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5,405,958 Photochromic spiro(indoline)naphthoxazine compounds 147 1992
5,369,158 Photochromic naphthopyrans 75 1993
5,466,398 Photochromic substituted naphthopyran compounds 134 1993
5,384,077 Photochromic naphthopyran compounds 138 1993
5,458,814 Substituted naphthopyrans 133 1993
5,429,774 Benzopyran compounds 130 1994
5,451,344 Photochromic naphthopyran compounds 91 1994
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5,514,817 Substituted phenanthropyrans 36 1994
5,458,815 Photochromic naphthopyran compounds 67 1994
5,411,679 Benzopyrans 86 1994
5,585,042 Photochromic naphthopyrans 14 1994
5,552,090 Photochromic naphthopyran compounds 27 1994
5,573,712 Substituted naphthopyrans 33 1995
5,637,262 Photochromic substituted naphthopyran compounds 19 1995
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5,658,500 Substituted naphthopyrans 22 1995
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5,552,091 Benzopyran compounds 31 1995
5,650,098 Substituted naphthopyrans 17 1995
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5,578,252 Photochromic substituted naphthopyran compounds 32 1995
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PERFORMANCE INDICATOR, LLC (9)
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8,287,757 High-intensity, persistent photoluminescent formulations and objects, and methods for creating the same 0 2011
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PPG INDUSTRIES, INC. (7)
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4,968,454 Variable-light transmittance article and method for preparing same 86 1988
4,936,995 Photochromic compound and articles containing the same 25 1988
4,986,934 Photochromic compound and articles containing the same 10 1988
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5,330,686 Temperature stable and sunlight protected photochromic articles 16 1992
5,340,857 Photochromic naphthopyrans 11 1993
 
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) (6)
5,139,707 Indolino-spiroquinoxalino oxazine photochromatic compounds, methods for their preparation, photochromic compositions and articles containing such compounds 35 1990
5,531,940 Method for manufacturing photochromic lenses 127 1993
5,789,015 Impregnation of plastic substrates with photochromic additives 77 1996
5,914,174 Lens or semi-finished blank comprising photochromic resin compositions 66 1996
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Ophthalmic Research Group International, Inc. (5)
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CORNING INCORPORATED (2)
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6,811,727 Ophthalmic filter materials 3 2002
 
VISION DYNAMICS, LLC (2)
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Xytronyx, Inc. (2)
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Kureha Kagaku Kogyo Kabushiki Kaisha (1)
5,017,698 Spirooxazine photochromic compounds 18 1989
 
OPTISCHE WERKE G. RODENSTOCK (1)
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Pilkington Brothers P.L.C. (1)
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TORAY INDUSTRIES, INC. (1)
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Other [Check patent profile for assignment information] (1)
4,705,046 Device for the qualitative measurement of uv radiation received by the skin 4 1986

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