| Patents for C09K 9 - Tenebrescent materials, i.e. materials for which the range of wavelengths for energy adsorption is changed as a result of excitation by some form of energy (4,715) |
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| 04/24/1991 | EP0423127A1 Novel photoactive compounds, processes for their production and intermediates therefor |
| 04/10/1991 | EP0421221A2 Colour photographic recording material with a DIR coupler |
| 04/03/1991 | EP0420659A2 Optical information storage mediums |
| 04/03/1991 | EP0420233A2 Novel phthalic acid derivative metal salt and shading and light-responsive plate containing the metal salt |
| 04/03/1991 | EP0420216A2 Use of a material as non-linear optical material and non-linear optical device |
| 03/27/1991 | EP0418916A2 Optical wavelength converting method |
| 03/20/1991 | EP0417624A2 Electrochromic window with polymer layer |
| 03/20/1991 | EP0417128A1 Photochromic compound and articles containing the same |
| 03/19/1991 | US5001243 Substituted naphthacene-5, 12-diones |
| 03/13/1991 | EP0231394B1 Novel polymers of3,4-substituted pyrrole compound and processfor their preparation |
| 03/12/1991 | US4999101 Preheat indicator |
| 03/07/1991 | WO1991003002A1 Photo-crosslinked polymers for non-linear optics |
| 03/07/1991 | WO1991002723A1 Phenanthroline derivative, bipyridyl derivative, and electrochromic display element |
| 03/06/1991 | EP0415817A1 Amorphous copolymers for use in non-linear optics |
| 02/27/1991 | EP0414476A1 Process for the preparation of photochromic spiropyran compounds |
| 02/26/1991 | US4996083 Reacting anhydrous transition metal halides with alkyl alcohol yields coating solution for forming electrochromic films |
| 02/21/1991 | DE3926872A1 Photovernetzte polymere fuer die nichtlineare optik Photo Crosslinked polymers for nonlinear optics |
| 02/20/1991 | EP0413201A1 Process for the preparation of 7-hydroxy-1,2-naphthoquinone-(2)-diazide-4-sulfonic acid or salts thereof and their use |
| 02/20/1991 | EP0413200A1 Substituted 1,2-naphthoquinone-(2)-diazide-4-sulfonic acids, process for their production and their use |
| 02/19/1991 | US4994208 Curable blend of allyl carbonate, acrylated polyurethane and allyl acrylates |
| 02/13/1991 | CA2023067A1 Substituted 1,2-naphthoquinone-2-diazide-4-sulfonic acids and processes for their preparation and use |
| 02/12/1991 | US4992347 Marking |
| 02/12/1991 | CA1280239C Vinylidene fluoride polymeric compositions of non-linear optical properties |
| 02/06/1991 | EP0411957A2 Photochromic materials having a thin photochromic film and a method for fabricating the same |
| 02/06/1991 | EP0411885A1 Novel photochromic spiropyran compounds |
| 02/06/1991 | EP0411884A1 Novel photochromic spiropyran compounds |
| 02/05/1991 | CA1279779C Processing holograms |
| 01/25/1991 | WO1991001312A1 Novel photoactive compounds |
| 01/25/1991 | CA2065005A1 Photoactive compounds |
| 01/22/1991 | US4987262 Absorbers of near infrared radiation, chromogens |
| 01/22/1991 | US4987255 Organic nonlinear optical material |
| 01/22/1991 | US4986934 Photochromic compound and articles containing the same |
| 01/15/1991 | CA1279140C Pigment composition |
| 01/09/1991 | EP0407237A2 Indolino-spiro-oxazine photochromic compounds, process for their preparation and photochromic compositions and materials containing them |
| 01/08/1991 | US4983810 Heating unit with thermochromic region |
| 01/02/1991 | CA1278421C Nonlinear optical materials and devices |
| 01/01/1991 | US4981962 Charge transfer complexes |
| 01/01/1991 | US4981833 Recording material using thermodecoloring dye |
| 12/27/1990 | CA1278398C Nitrogenized electronic conductive polymers, their preparation processes, electrochromic display cell and electro-chemical generator using these polymers |
| 12/19/1990 | EP0403157A2 Thermal dye bleach construction |
| 12/12/1990 | EP0402228A2 Indolino-spiro-oxazine photochromic compounds having a five-membered ring, process for their preparation and photochromic compositions and materials containing them |
| 12/12/1990 | EP0401958A2 Photochromic compound, composition and use thereof |
| 12/12/1990 | CA2018359A1 Thermal dye bleach construction |
| 12/11/1990 | US4977051 Trisazo electrophotographic photoreceptor |
| 11/20/1990 | US4971725 Thermochromic double-complex salts |
| 11/13/1990 | US4970315 Thermochromic indicators for structural elements |
| 11/06/1990 | US4968454 Variable-light transmittance article and method for preparing same |
| 10/23/1990 | US4965091 Sol gel method for forming thin luminescent films |
| 10/19/1990 | WO1990012819A1 Photochromic polymeric article |
| 10/19/1990 | CA2051443A1 Photochromic polymeric article |
| 10/16/1990 | US4963448 Transparent substrate, photochromic compound, liquid crystal |
| 10/10/1990 | EP0390878A1 Optically anisotropic photochromic materials and applications |
| 10/09/1990 | US4962013 Photochromic material containing a spirooxazine and a nitroxy free radical triplet state quencher |
| 10/03/1990 | EP0389813A1 A method for preparing a photochromic material |
| 10/03/1990 | EP0272298B1 Irreversible photochromic markings |
| 10/02/1990 | US4960678 Photochromic compounds |
| 10/02/1990 | CA1274710A1 Holograms |
| 09/25/1990 | US4959471 Improved migration properties in plastics, lenses |
| 09/18/1990 | CA1274244A1 Thermochromic double-complex salts |
| 09/05/1990 | EP0385407A2 A photochromic material |
| 08/22/1990 | CN1044860A Fake-guarding material and its prodn |
| 08/16/1990 | EP0382623A1 Alkaline kation-conducting colloid material and uses as electrolytes |
| 08/16/1990 | EP0382294A1 Photochromic composition endowed with light fatigue resistance and photochromic articles which contain it |
| 08/14/1990 | US4948688 Sensitivity, durability |
| 08/09/1990 | CA2009610A1 Alcaline cations conductives colloidal material and its application as an electrolyte |
| 08/01/1990 | EP0379547A1 Photochromic polymer membrane |
| 07/17/1990 | US4941997 Amphiphilic azo dyes and molecular aggregates thereof |
| 07/10/1990 | US4940689 Display material |
| 06/26/1990 | US4936995 Photochromic compound and articles containing the same |
| 06/14/1990 | WO1990006539A1 Security marking |
| 06/14/1990 | WO1990006535A1 Materials exhibiting large non linear optical properties |
| 06/13/1990 | EP0373110A2 Pressure-sensitive or heat-sensitive recording material |
| 06/05/1990 | US4931219 Photochromic compound and articles containing the same |
| 06/01/1990 | CA2004423A1 Security marking |
| 05/29/1990 | US4929693 Contact lenses, weatherproofing |
| 05/22/1990 | US4927464 Particulate material |
| 05/16/1990 | EP0368567A2 Method of making an electrochromic material |
| 05/16/1990 | EP0368276A2 Electrophotographic photoreceptor |
| 05/07/1990 | CA2000880A1 Electrochromic material and method of making an electrochromic material |
| 04/24/1990 | CA1268086A1 Solar concentrator plates |
| 04/24/1990 | CA1268034A1 Photochromic composition resistant to fatigue |
| 04/24/1990 | CA1268032A1 Light modulating material comprising a liquid crystal dispersion in a plastic matrix |
| 04/18/1990 | EP0364120A2 A cycloalkene compound and a recording material using the compound |
| 04/17/1990 | US4918317 Microcapsules containing radiochromic dyes |
| 04/11/1990 | EP0362771A1 Photochromic substances |
| 04/11/1990 | EP0248907B1 Photochromic material, photochromic element and method of recording and erasing data |
| 04/10/1990 | CA1267559A1 Light-sensitive composition for the preparation of a positive-acting photoresist |
| 04/05/1990 | WO1990003379A1 Photochromic substances |
| 04/03/1990 | US4913948 Optical recording medium |
| 04/03/1990 | US4913544 Windows, optical glass |
| 03/28/1990 | EP0359909A2 Photochromic color rendering regulatory cosmetics |
| 03/21/1990 | EP0358774A1 Novel spirooxazine compounds |
| 03/14/1990 | EP0358080A2 Silicon naphthalocyanine with unsaturated ligands, and optical recording medium |
| 03/08/1990 | DE3844003C1 Photochromic, silicate-containing foam glass (foamed glass, cellular glass) material or foamed-glass composite |
| 02/28/1990 | EP0356116A2 A steam sensitive composition and a sterilization indicator composition containing the same |
| 02/22/1990 | WO1990001480A1 Optical memory |
| 02/20/1990 | US4902108 Reverse variable transmittance of light |
| 01/31/1990 | EP0353189A1 Copper and nickel dihalogenide complexes, process for their preparation and their use |
| 01/18/1990 | DE3823496A1 Novel crown compounds and their use |
| 01/17/1990 | EP0351112A2 Photochromic compound, process for production thereof, use thereof and composition containing said photochromic compound |