US Patent No: 5,955,520

Number of patents in Portfolio can not be more than 2000

Photochromic indeno-fused naphthopyrans

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Abstract

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Described are novel photochromic indeno-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted indeno group, the 2,1 positions of which are fused to the f side of the naphtho portion of the naphthopyran, and having certain substituents at the 3-position of the pyran ring. Certain substituents may also be present at the number 5, 6, 7, 8, 9, 10, 11, 12 or 13 carbon atoms of the compounds. 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. Optically clear articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, benzopyrans and spiro(indoline)type compounds, are also described.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PPG INDUSTRIES OHIO, INC.CLEVELAND, OH2318
TRANSITIONS OPTICAL, INC.PINELLAS PARK, FL160

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heller, Harry G Cardiff, GB 7 401
Levell, Julian R Lyne, GB 1 18

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TRANSITIONS OPTICAL, INC. (15)
5,238,981 Photochromic naphthopyrans 150 1992
5,274,132 Photochromic naphthopyran compounds 168 1992
5,405,958 Photochromic spiro(indoline)naphthoxazine compounds 150 1992
5,369,158 Photochromic naphthopyrans 75 1993
5,384,077 Photochromic naphthopyran compounds 141 1993
5,466,398 Photochromic substituted naphthopyran compounds 137 1993
5,458,814 Substituted naphthopyrans 133 1993
5,429,774 Benzopyran compounds 133 1994
5,451,344 Photochromic naphthopyran compounds 91 1994
5,514,817 Substituted phenanthropyrans 36 1994
5,585,042 Photochromic naphthopyrans 14 1994
5,552,090 Photochromic naphthopyran compounds 27 1994
5,565,147 Photochromic naphthopyran compounds 25 1995
5,645,767 Photochromic indeno-fused naphthopyrans 152 1995
5,578,252 Photochromic substituted naphthopyran compounds 32 1995
 
PPG INDUSTRIES OHIO, INC. (7)
4,637,698 Photochromic compound and articles containing the same 138 1984
4,816,584 Photochromic spiro(indoline)benzoxazines 115 1987
4,880,667 Photochromic plastic article and method for preparing same 114 1987
4,931,221 Photochromic spiropyran compounds 50 1988
5,066,818 Photochromic naphthopyran compounds 146 1990
5,244,602 Photochromic naphthopyrans 43 1990
5,395,567 Photochromic spironaphthopyran compounds 13 1994
 
AMERICAN OPTICAL CORPORATION (2)
4,215,010 Photochromic compounds 139 1978
4,342,668 Photochromic compounds 139 1980
 
PLESSEY OVERSEAS LIMITED (2)
4,826,977 Photochromic spiropyran compounds 122 1987
4,818,096 Photoreactive lenses with adamantane spiro compounds 120 1987
 
AO, INC. (1)
4,720,356 Photochromic composition resistant to fatigue 145 1987
 
Bayer Aktiengesellschaft (1)
4,563,458 Substituted 4-aminomethylene-chromans and -chromenes, processes for their preparation and their use in medicaments 23 1983
 
PPG INDUSTRIES, INC. (1)
4,931,219 Photochromic compound and articles containing the same 77 1989

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TRANSITIONS OPTICAL, INC. (10)
6,736,998 Indeno-fused photochromic naphthopyrans 17 2001
7,320,826 Photochromic articles with reduced temperature dependency and methods for preparation 22 2003
7,556,750 Photochromic materials with reactive substituents 6 2005
7,556,751 Photochromic materials having electron-withdrawing substituents 2 2005
8,211,338 Photochromic compounds 1 2008
8,545,984 Photochromic compounds and compositions 0 2010
8,518,546 Photochromic compounds and compositions 0 2010
8,698,117 Indeno-fused ring compounds 0 2011
8,647,538 Photochromic compounds having at least two photochromic moieties 0 2011
8,705,160 Photochromic compounds 0 2012
 
Corning S.A. (3)
6,506,538 Naphthopyrans annelated in C5-C6, their preparation and compositions and (co)polymer matrices containing them 11 1999
6,426,023 Benzopyrans annelated in C7-C8 with an aromatic heterocycle and compositions and (CO)polymer matrices containing them 2 2000
6,379,591 Naphthopyrans annelated in C5-C6 with a lactam-type C6 ring and compositions and (co)polymer matrices containing them 4 2000
 
RODENSTOCK GMBH (2)
8,013,174 Photochromic spirodihydrophenanthropyrans 0 2008
7,892,296 Photochromic benzopyrans 0 2008
 
CORNING INCORPORATED (1)
7,332,260 Naphthopyrans annelated in C5-C6, their preparation and compositions and (CO)polymer matrices containing them 0 2002
 
INSIGHT EQUITY A.P.X., L.P. (1)
6,863,843 Naphthopyran compounds, photoresponsive compositions and lenses 1 2000
 
SECOND OPTICAL HOLDING GMBH (1)
6,146,554 Photochromic naphtopyrane colorants, method for the production and use thereof, photochromic object 32 1999