US Patent No: 5,458,815

Number of patents in Portfolio can not be more than 2000

Photochromic naphthopyran compounds

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Importance

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Abstract

Described are novel reversible photochromic naphthopyran compounds, examples of which are compounds substituted at the 3 position of the pyran ring with (i) an aryl substituent and (ii) a phenyl substituent having a 5- or 6-member heterocyclic ring fused at the number 3 and 4 carbon atoms of the phenyl substituent. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TRANSITIONS OPTICAL, INC.PINELLAS PARK, FL128

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Knowles, David B Apollo, PA 51 1338

Cited Art

Patent Info (Count) # Cites Year
 
PPG INDUSTRIES OHIO, INC. (5)
4,637,698 Photochromic compound and articles containing the same 128 1984
4,816,584 Photochromic spiro(indoline)benzoxazines 106 1987
5,066,818 Photochromic naphthopyran compounds 132 1990
5,200,116 Photochromic chromene compounds 53 1990
5,244,602 Photochromic naphthopyrans 43 1990
 
TRANSITIONS OPTICAL, INC. (3)
5,238,981 Photochromic naphthopyrans 144 1992
5,274,132 Photochromic naphthopyran compounds 155 1992
5,369,158 Photochromic naphthopyrans 75 1993
 
AMERICAN OPTICAL CORPORATION (2)
4,215,010 Photochromic compounds 129 1978
4,342,668 Photochromic compounds 129 1980
 
PLESSEY OVERSEAS LIMITED (2)
4,826,977 Photochromic spiropyran compounds 112 1987
4,818,096 Photoreactive lenses with adamantane spiro compounds 110 1987
 
AO, INC. (1)
4,720,356 Photochromic composition resistant to fatigue 139 1987
 
PPG INDUSTRIES, INC. (1)
5,340,857 Photochromic naphthopyrans 11 1993

Patent Citation Ranking

Forward Cites

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6,328,445 Methods and apparatus for eyeglass lens curing using ultraviolet light 41 1999
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6,712,596 System for producing ultraviolet blocking lenses 16 1999
6,368,523 Method and composition for producing ultraviolet blocking lenses 37 1999
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6,716,375 Apparatus and method for heating a polymerizable composition 14 2000
7,079,920 Plastic lens systems, compositions, and methods 1 2001
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7,124,995 Holder for mold assemblies and molds 0 2001
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VISION DYNAMICS, LLC (15)
5,989,462 Method and composition for producing ultraviolent blocking lenses 72 1997
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6,419,873 Plastic lens systems, compositions, and methods 42 1999
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JAMES ROBINSON LIMITED (1)
6,294,112 Red coloring hyperchromic 3H-naphtho[2,1-B]pyrans 4 1999
 
SDC TECHNOLOGIES, INC. (1)
6,773,108 Lens with photochromic elastomer film and method of making it 1 2001
 
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5,744,070 Photochromic substituted naphthopyran compounds 6 1995