US Patent No: 5,891,368

Number of patents in Portfolio can not be more than 2000

Fluoranthenopyrans

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Abstract

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Described are novel photochromic 8-substituted fluoranthenopyran compounds having certain substituents at the 5 position of the pyran ring. These compounds 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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PPG INDUSTRIES OHIO, INC.CLEVELAND, OH2309
TRANSITIONS OPTICAL, INC.PINELLAS PARK, FL159

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kumar, Anil Allegheny County, PA 292 2225

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TRANSITIONS OPTICAL, INC. (15)
5,238,981 Photochromic naphthopyrans 149 1992
5,274,132 Photochromic naphthopyran compounds 166 1992
5,405,958 Photochromic spiro(indoline)naphthoxazine compounds 148 1992
5,384,077 Photochromic naphthopyran compounds 139 1993
5,466,398 Photochromic substituted naphthopyran compounds 135 1993
5,458,814 Substituted naphthopyrans 133 1993
5,429,774 Benzopyran compounds 131 1994
5,514,817 Substituted phenanthropyrans 36 1994
5,552,090 Photochromic naphthopyran compounds 27 1994
5,573,712 Substituted naphthopyrans 33 1995
5,565,147 Photochromic naphthopyran compounds 25 1995
5,656,206 Substituted naphthopyrans 18 1995
5,552,091 Benzopyran compounds 32 1995
5,645,767 Photochromic indeno-fused naphthopyrans 149 1995
5,578,252 Photochromic substituted naphthopyran compounds 32 1995
 
PPG INDUSTRIES OHIO, INC. (6)
4,360,653 Polymerizate of (allyl carbonate) and aliphatic polyurethane having acrylic unsaturation 42 1981
4,816,584 Photochromic spiro(indoline)benzoxazines 113 1987
4,880,667 Photochromic plastic article and method for preparing same 112 1987
4,994,208 Photochromic polymeric article 60 1989
5,066,818 Photochromic naphthopyran compounds 144 1990
5,200,483 Polyol(allyl carbonate) composiitons and articles prepared there from 25 1991
 
AMERICAN OPTICAL CORPORATION (2)
4,215,010 Photochromic compounds 137 1978
4,342,668 Photochromic compounds 137 1980
 
PLESSEY OVERSEAS LIMITED (2)
4,826,977 Photochromic spiropyran compounds 120 1987
4,818,096 Photoreactive lenses with adamantane spiro compounds 118 1987
 
PPG INDUSTRIES, INC. (2)
4,931,220 Organic photochromic pigment particulates 141 1987
4,931,219 Photochromic compound and articles containing the same 75 1989
 
CARL ZEISS VISION AUSTRALIA HOLDINGS LTD. (1)
5,373,033 Casting composition 34 1994
 
TOKUYAMA CORPORATION (1)
5,475,074 Polymerizable composition, organic glass and ophthalmic lens 21 1994

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TRANSITIONS OPTICAL, INC. (8)
8,003,005 Alignment facilities for optical dyes 2 2008
7,910,019 Mesogen containing compounds 7 2009
7,910,020 Liquid crystal compositions comprising mesogen containing compounds 6 2009
8,628,685 Mesogen-containing compounds 0 2011
8,623,238 Mesogenic stabilizers 0 2011
8,613,868 Mesogenic stabilizers 0 2011
8,431,039 Mesogenic stabilizers 0 2011
8,349,210 Mesogenic stabilizers 0 2011
 
Corning S.A. (1)
6,203,729 [Pyrrole]naphthopyranes, their preparation, and compositions and (co)polymer matrices containing them 2 1999
 
Vimicro Corporation (1)
6,207,084 Naphthopyrans annelated in C6-C7, their preparation and compositions and (CO)polymer matrices containing them 1 1999