Spiro-indoline oxazine compounds with photochromatic and photosensitizing characteristics and the process for their preparation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

5186867

SERIAL NO

07842800

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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New compounds of the spiro-indoline-oxazine class possessing photochromatic and photosensitizing charecteristics are definable by the general formula (I): ##STR1## where the substituents R, R.sup.1 -R.sup.7 and A are as defined in the description. The process for preparing the compounds (I) is described, as is their use as photochromic agents able to confer photochromatic characteristics on the articles in which they are incorporated, and as photosensitizing agents.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ENICHEM SYNTHESIS S.P.A.PALERMO32
GREAT LAKES CHEMICAL (EUROPE) GMBHFRAUENFELD9

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Allegrini, Pietro San Donato Milanese, IT 104 193
Castaldi, Graziano Briona, IT 81 195
Crisci, Luciana Sant'Angelo Lodigiano, IT 12 68
Renzi, Fiorenzo Gorgonzola, IT 27 105

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PPG INDUSTRIES, INC. (4)
* 4785097 Method for synthesizing spiro-oxazines 14 1986
* 4792224 Photochromic compound and articles containing the same 33 1987
* 4968454 Variable-light transmittance article and method for preparing same 88 1988
* 4931219 Photochromic compound and articles containing the same 87 1989
 
PPG INDUSTRIES OHIO, INC. (2)
* 4816584 Photochromic spiro(indoline)benzoxazines 125 1987
* 5021196 Method for preparing variable-light transmittance article 21 1990
 
TORAY INDUSTRIES, INC. (1)
* 4784474 Spiro-oxazine compounds and preparation thereof and photochromic shaped article 8 1987
 
NISSAN MOTOR CO., LTD. (1)
* 4962013 Photochromic material containing a spirooxazine and a nitroxy free radical triplet state quencher 17 1988
 
PILKINGTON PLC (1)
* 4913544 Photochromic articles 106 1987
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GREAT LAKES CHEMICAL (EUROPE) GMBH (1)
* 7262294 Photochromatic pyrano-1,3-oxazinonaphthalene derivatives 0 2001
 
MATTEL, INC. (1)
8951091 Toy vehicle playset and color changing toy vehicle 0 2012
 
TRANSITIONS OPTICAL, INC. (9)
* 6136968 Homoazaadamantane spirooxazines and their use in the field of ophthalmic optics 34 1999
8211338 Photochromic compounds 2 2008
* 2009/0309,076 PHOTOCHROMIC COMPOUNDS 13 2008
8545984 Photochromic compounds and compositions 2 2010
8518546 Photochromic compounds and compositions 1 2010
* 2011/0140,056 Indeno-fused ring compounds 10 2010
8698117 Indeno-fused ring compounds 3 2011
8705160 Photochromic compounds 0 2012
9309455 Indeno-fused ring compounds 0 2014
 
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) (1)
* 5831090 Process for the preparation of photochromic compounds of the annelated spiro?indoline?2,3'! benzoxazine!type 6 1997
 
YEDA RESEARCH AND DEVELOPMENT CO., LTD. at The Weizmann Institute of Science (2)
* 5473068 Photochromic spirooxazine monomers and polysiloxanes 6 1994
6891038 Photochromic spiro(indoline)naphthoxazines 8 2001
 
MAGICHITECHCO, LTD. (1)
* 2004/0126,340 Ultraviolet-screening and color-chaning composition and its preparing method 3 2003
* Cited By Examiner