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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Sep 21, 1999
Issued date -
Jun 17, 1996
filing date -
08/666,726
serial no -
In Force
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Abstract
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
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,238,981 Photochromic naphthopyrans | 144 | 1992 | |
| 5,274,132 Photochromic naphthopyran compounds | 155 | 1992 | |
| 5,405,958 Photochromic spiro(indoline)naphthoxazine compounds | 141 | 1992 | |
| 5,369,158 Photochromic naphthopyrans | 75 | 1993 | |
| 5,384,077 Photochromic naphthopyran compounds | 132 | 1993 | |
| 5,466,398 Photochromic substituted naphthopyran compounds | 125 | 1993 | |
| 5,458,814 Substituted naphthopyrans | 124 | 1993 | |
| 5,429,774 Benzopyran compounds | 127 | 1994 | |
| 5,451,344 Photochromic naphthopyran compounds | 91 | 1994 | |
| 5,514,817 Substituted phenanthropyrans | 33 | 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 | 131 | 1995 | |
| 5,578,252 Photochromic substituted naphthopyran compounds | 28 | 1995 | |
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| 4,637,698 Photochromic compound and articles containing the same | 129 | 1984 | |
| 4,816,584 Photochromic spiro(indoline)benzoxazines | 106 | 1987 | |
| 4,880,667 Photochromic plastic article and method for preparing same | 104 | 1987 | |
| 4,931,221 Photochromic spiropyran compounds | 46 | 1988 | |
| 5,066,818 Photochromic naphthopyran compounds | 133 | 1990 | |
| 5,244,602 Photochromic naphthopyrans | 43 | 1990 | |
| 5,395,567 Photochromic spironaphthopyran compounds | 13 | 1994 | |
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| 4,215,010 Photochromic compounds | 130 | 1978 | |
| 4,342,668 Photochromic compounds | 130 | 1980 | |
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| 4,826,977 Photochromic spiropyran compounds | 113 | 1987 | |
| 4,818,096 Photoreactive lenses with adamantane spiro compounds | 111 | 1987 | |
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| 4,720,356 Photochromic composition resistant to fatigue | 140 | 1987 | |
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| 4,563,458 Substituted 4-aminomethylene-chromans and -chromenes, processes for their preparation and their use in medicaments | 23 | 1983 | |
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| 4,931,219 Photochromic compound and articles containing the same | 68 | 1989 | |