US Patent No: 4,913,544

Number of patents in Portfolio can not be more than 2000

Photochromic articles

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Abstract

A plastic organic photochromic article, typically a lens such as an ophthalmic lens or a window such as a vehicle roof light, comprisig a plastics host material having a photochromic compound incorporated therein or applied thereto, the article exhibiting the following properties, measured at Air Mass 2 at 25.degree. C.: (a) an integrated visible transmission in the faded state (B.IVT) ranging from 90 to 25%, (b) an integrated visible transmission in the darkened state (D.IVT) ranging from 1 to 50%, preferably 4 to 30%, (c) the rate of darkening of the article when it is exposed to actinic radiation is such that 88% of the darkening range is achieved in 30 seconds or less, i.e. T.sub.88 .ltoreq.30 secs, (d) the rate of fading of the article from its fully darkened condition is such that more than 60% of the optical density range is recovered in 60 seconds, i.e. % ODG-1.gtoreq.60%, and (e) the induced optical density of the article, i.e. the change in the optical density of the article, in moving from the faded state (B.IVT) to the darkened state (D.IVT), is greater than 0.45. Typically, the photochromic compound is a spiro-oxazine compound of general formula (II), ##STR1##

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PILKINGTON BROTHERS P.L.C.ST HELENS34
PILKINGTON PLCST HELENS106

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hepworth, John D Preston, GB 4 134
Rickwood, Martin Clarks Summit, PA 18 227

Cited Art

Patent Info (Count) # Cites Year
 
AMERICAN OPTICAL CORPORATION (1)
4,215,010 Photochromic compounds 130 1978
 
AO, INC. (1)
4,720,356 Photochromic composition resistant to fatigue 140 1987
 
ETAT FRANCAIS REPRESENTE PAR LE DELEGUE GENERAL POUR L'ARMEMENT (1)
4,287,337 Spiropyran compounds of piperidine or thiazine rings 83 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
Q2100, INC. (47)
6,022,498 Methods for eyeglass lens curing using ultraviolet light 72 1996
6,228,289 Plastic lens systems and methods 47 1998
6,174,465 Methods for eyeglass lens curing using ultaviolet light 49 1998
6,200,124 Apparatus for eyeglass lens curing using ultraviolet light 41 1998
6,328,445 Methods and apparatus for eyeglass lens curing using ultraviolet light 41 1999
6,280,171 El apparatus for eyeglass lens curing using ultraviolet light 40 1999
6,712,596 System for producing ultraviolet blocking lenses 16 1999
6,368,523 Method and composition for producing ultraviolet blocking lenses 37 1999
6,576,167 Methods and apparatus for eyeglass curing using ultraviolet light and improved cooling 10 1999
6,723,260 Method for marking a plastic eyeglass lens using a mold assembly holder 14 2000
6,716,375 Apparatus and method for heating a polymerizable composition 14 2000
7,079,920 Plastic lens systems, compositions, and methods 1 2001
6,729,866 Plastic lens systems 15 2001
6,634,879 Plastic lens systems, compositions, and methods 14 2001
6,557,734 Plastic lens systems, compositions, and methods 15 2001
7,139,636 System for preparing eyeglass lenses with bar code reader 5 2001
7,124,995 Holder for mold assemblies and molds 0 2001
7,083,404 System for preparing an eyeglass lens using a mold holder 0 2001
7,074,352 Graphical interface for monitoring usage of components of a lens forming apparatus 0 2001
7,060,208 Method of preparing an eyeglass lens with a controller 0 2001
7,052,262 System for preparing eyeglasses lens with filling station 1 2001
7,051,290 Graphical interface for receiving eyeglass prescription information 1 2001
7,045,081 Method of monitoring components of a lens forming apparatus 1 2001
7,037,449 Method for automatically shutting down a lens forming apparatus 0 2001
7,025,910 Method of entering prescription information 0 2001
7,011,773 Graphical interface to display mold assembly position in a lens forming apparatus 0 2001
7,004,740 Apparatus for preparing an eyeglass lens having a heating system 0 2001
6,962,669 Computerized controller for an eyeglass lens curing apparatus 5 2001
6,899,831 Method of preparing an eyeglass lens by delayed entry of mold assemblies into a curing apparatus 1 2001
6,893,245 Apparatus for preparing an eyeglass lens having a computer system controller 6 2001
6,863,518 Mold filing apparatus having multiple fill stations 11 2001
6,840,752 Apparatus for preparing multiple eyeglass lenses 11 2001
6,808,381 Apparatus for preparing an eyeglass lens having a controller 14 2001
6,790,022 Apparatus for preparing an eyeglass lens having a movable lamp mount 13 2001
6,790,024 Apparatus for preparing an eyeglass lens having multiple conveyor systems 14 2001
6,758,663 System for preparing eyeglass lenses with a high volume curing unit 16 2001
6,752,613 Apparatus for preparing an eyeglass lens having a controller for initiation of lens curing 15 2001
6,726,463 Apparatus for preparing an eyeglass lens having a dual computer system controller 15 2001
6,712,331 Holder for mold assemblies with indicia 16 2001
6,709,257 Eyeglass lens forming apparatus with sensor 20 2001
6,702,564 System for preparing an eyeglass lens using colored mold holders 16 2001
6,676,398 Apparatus for preparing an eyeglass lens having a prescription reader 16 2001
6,676,399 Apparatus for preparing an eyeglass lens having sensors for tracking mold assemblies 14 2001
6,655,946 Apparatus for preparing an eyeglass lens having a controller for conveyor and curing units 21 2001
7,044,429 Methods and systems for coating eyeglass lens molds 12 2002
6,464,484 Apparatus and system for the production of plastic lenses 35 2002
6,960,312 Methods for the production of plastic lenses 0 2002
 
VISION DYNAMICS, LLC (15)
5,989,462 Method and composition for producing ultraviolent blocking lenses 72 1997
6,478,990 Plastic lens systems and methods 41 1998
6,451,226 Plastic lens compositions 38 1998
6,171,528 Methods and apparatus for eyeglass lens curing using ultraviolet light 48 1998
6,241,505 Apparatus for eyeglass lens curing using ultraviolet light 42 1998
6,419,873 Plastic lens systems, compositions, and methods 42 1999
6,174,155 Apparatus for producing ultraviolet blocking lenses 49 1999
6,367,928 Method and composition for producing ultraviolet blocking lenses 37 1999
6,673,278 Methods and apparatus for eyeglass lens curing using ultraviolet light and improved cooling 14 1999
6,698,708 Gasket and mold assembly for producing plastic lenses 15 2000
6,632,535 Method of forming antireflective coatings 20 2000
6,612,828 Fill system with controller for monitoring use 18 2001
6,786,598 Plastic eyeglass lenses 10 2002
6,926,510 Plastic lens systems and compositions 0 2002
6,939,899 Composition for producing ultraviolet blocking lenses 2 2002
 
PERFORMANCE INDICATOR LLC (9)
7,910,022 Phosphorescent compositions for identification 2 2007
7,547,894 Phosphorescent compositions and methods for identification using the same 13 2007
8,039,193 Tissue markings and methods for reversibly marking tissue employing the same 0 2007
7,842,128 Tissue marking compositions 1 2007
RE44254 Phosphorescent compositions and methods for identification using the same 0 2011
8,287,757 High-intensity, persistent photoluminescent formulations and objects, and methods for creating the same 0 2011
8,293,136 High-intensity, persistent photoluminescent formulations and objects, and methods for creating the same 0 2011
8,282,858 High-intensity, persistent photoluminescent formulations and objects, and methods for creating the same 0 2011
8,409,662 High-intensity, persistent photoluminescent formulations and objects, and methods for creating the same 0 2012
 
CORNING INCORPORATED (4)
6,034,193 Photochromic organic materials 7 1997
6,030,555 Photochromic spiroxazines, compositions and articles containing them 1 1998
6,811,727 Ophthalmic filter materials 2 2002
8,188,181 Photochromic compositions, resins and articles obtained therefrom 0 2009
 
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) (3)
5,789,015 Impregnation of plastic substrates with photochromic additives 76 1996
5,914,174 Lens or semi-finished blank comprising photochromic resin compositions 63 1996
5,851,585 Impregnation of plastic substrates with photochromic additives 9 1997
 
ESSILOR INTERNATIONAL COMPAGNIE GENERALE D'OPTIQUE (2)
6,017,121 Multifocal artificial ocular lens with a transparency varying with illumination 3 1996
6,224,210 Multifocal artificial ocular lens with a transparency varying with illumination 9 1999
 
PILKINGTON PLC (2)
5,446,149 Bridged spiroxazine photochromic compounds 2 1993
5,446,151 Photo reactive spiro-benzoxazine compounds 11 1993
 
PPG INDUSTRIES OHIO, INC. (2)
5,021,196 Method for preparing variable-light transmittance article 14 1990
5,739,243 Polymerizable composition 16 1996
 
PPG INDUSTRIES, INC. (2)
4,986,934 Photochromic compound and articles containing the same 10 1988
5,330,686 Temperature stable and sunlight protected photochromic articles 16 1992
 
Q1200, Inc. (2)
6,875,005 Apparatus for preparing an eyeglass lens having a gating device 9 2001
6,964,479 Plastic lens system, compositions, and methods 0 2002
 
TOKUYAMA CORPORATION (2)
7,441,893 Layered product and method of producing the same 0 2005
8,409,714 Primer composition for optical articles and optical articles 0 2010
 
TRANSITIONS OPTICAL, INC. (2)
5,405,958 Photochromic spiro(indoline)naphthoxazine compounds 141 1992
6,136,968 Homoazaadamantane spirooxazines and their use in the field of ophthalmic optics 19 1999
 
YEDA RESEARCH AND DEVELOPMENT CO. LTD. (2)
5,473,068 Photochromic spirooxazine monomers and polysiloxanes 6 1994
6,891,038 Photochromic spiro(indoline)naphthoxazines 2 2001
 
GENTEX OPTICS, INC. (1)
6,451,236 Method of making photochromic thermoplastics 1 2000
 
GOTOHTI.COM INC. (1)
8,071,933 Photochromic optically keyed dispenser 0 2009
 
GREAT LAKES CHEMICAL (EUROPE) GMBH (1)
5,186,867 Spiro-indoline oxazine compounds with photochromatic and photosensitizing characteristics and the process for their preparation 6 1992
 
HODOGAYA CHEMICAL CO., LTD. (1)
5,641,884 Spiro-naphtho-oxazine compound and photosensitive materials using the same 1 1994
 
OPTICAL MOLDING SYSTEMS, INC. (1)
6,936,197 Method and compositions for manufacturing coated photochromatic articles 2 1999
 
PILKINGTON PLC PRESCOT ROAD (1)
5,446,150 Photochromic spiroxazine compounds 11 1993
 
SABIC INNOVATIVE PLASTICS IP B.V. (1)
6,114,437 Polycarbonate articles with photochromic properties 10 1998
 
SIGNET ARMORLITE, INC. (1)
6,863,844 Photochromic matrix compositions for use in ophthalmic lenses 7 2002
 
TDK CORPORATION (1)
5,576,055 Photochromic material, photochromic thin film, clay thin film, and their preparation 2 1995
 
Other [Check patent profile for assignment information] (1)
7,276,189 Method and compositions for manufacturing plastic optical lens 0 2000