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Patent for License:

Photochromic Compound    

Photochromic material including a compound belonging to the diheteroarylethene category.

Overview

The photochromic material has practically no fading problem under ambient light, and has an excellent long-time stability of recorded or displayed information.

Primary Application of the Technology

Optical Memory Media, Optical Display Materials, Optical Elements

Comments on Deal Structure, Potential Terms and Restrictions

Patent available for commercialization, enforcement rights negotiable.

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 549: Organic Compounds -- Part Of The Class 532 Series

The classes of the 532 series embrace monomeric organic carbon compounds and polymeric organic carbon compounds that are not solid synthetic resins, natural rubbers, or hydrocarbons.

Subclass 59: Additional hetero ring containing

Class 526: Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series

Part of the Class 520 Series - some general types of subject matter include: Solid synthetic resins, per se, regardless of utility; processes of preparing a synthetic resin involving a chemical reaction; reactable compositions which form a product; processes of purifying a solid synthetic resin or composition containing a synthetic resin by a chemical or physical process; process of reclaiming or recovering a solid synthetic resin; processes of treating a synthetic resin or specified intermediate condensation product with a reactant, or product thereof; blends of solid synthetic resins, processes of preparing or treating such blends; chemically reacted solid synthetic resins or processes of preparing; potentially reactable compositions which contain a solid synthetic resin or SICP and products of such a reaction, or processes of preparing; room vulcanizable potentially reactive compositions which merely require moisture and which are usually activated by heat and/or pressure to form a product; compositions of a nonreactant material and a solid synthetic resin or SICP; compositions containing a structurally defined material which is dispersed in a matrix which is not identified by overall dimension or some structure or processes of preparing; single-layered products containing a solid synthetic resin or composition thereof reciting no structure or dimension, or a fiber, filament, etc., which is no more than the material from which it is made, nonstructured single-layered web or sheet is encompassed; particles or a powder, per se, of a solid synthetic resin or composition thereof for which particles or powder no dimensions are recited; reactable compositions which form a product proper for this class and contain a photoinitiator or photosensitizer which are activated by wave energy or processes of preparing.

Subclass 204: Material contains heterocyclic compound

Class 528: Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series

Part of the Class 520 Series - some general types of subject matter include: Solid synthetic resins, per se, regardless of utility; processes of preparing a synthetic resin involving a chemical reaction; reactable compositions which form a product; processes of purifying a solid synthetic resin or composition containing a synthetic resin by a chemical or physical process; process of reclaiming or recovering a solid synthetic resin; processes of treating a synthetic resin or specified intermediate condensation product with a reactant, or product thereof; blends of solid synthetic resins, processes of preparing or treating such blends; chemically reacted solid synthetic resins or processes of preparing; potentially reactable compositions which contain a solid synthetic resin or SICP and products of such a reaction, or processes of preparing; room vulcanizable potentially reactive compositions which merely require moisture and which are usually activated by heat and/or pressure to form a product; compositions of a nonreactant material and a solid synthetic resin or SICP; compositions containing a structurally defined material which is dispersed in a matrix which is not identified by overall dimension or some structure or processes of preparing; single-layered products containing a solid synthetic resin or composition thereof reciting no structure or dimension, or a fiber, filament, etc., which is no more than the material from which it is made, nonstructured single-layered web or sheet is encompassed; particles or a powder, per se, of a solid synthetic resin or composition thereof for which particles or powder no dimensions are recited; reactable compositions which form a product proper for this class and contain a photoinitiator or photosensitizer which are activated by wave energy or processes of preparing.

Subclass 380: Heterocyclic reactant contains a ring composed solely of carbon atoms and a single sulfur atom

European Patent Classes & Classifications Covered in this listing:

Class C07D277: CHEMISTRY; METALLURGY - ORGANIC CHEMISTRY

HETEROCYCLIC COMPOUNDS. Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings .

Class C07D307: CHEMISTRY; METALLURGY - ORGANIC CHEMISTRY

HETEROCYCLIC COMPOUNDS. Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom .

Class C07D333: CHEMISTRY; METALLURGY - ORGANIC CHEMISTRY

HETEROCYCLIC COMPOUNDS. Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom .

Class C09K9: CHEMISTRY; METALLURGY - DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; MISCELLANEOUS COMPOSITIONS; MISCELLANEOUS APPLICATIONS OF MATERIALS

MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE. Tenebrescent materials, i.e. materials for which the range of wavelength for energy absorption is changed as result of excitation by some form of energy .

Class G03C1: PHYSICS - PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY

PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES . Photosensitive materials .

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