The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 1991
Filed:
Mar. 17, 1989
Kazuhiko Furuya, Kanagawa, JP;
Satoru Sawada, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A method of preserving colored images formed by exposing imagewise a heat developable color photosensitive element which has a construction which includes, on a support, at least a photosensitive silver halide, a binder and a dye providing substance which forms or releases a diffusible dye in proportion, or in inverse proportion, to a reaction in which the silver halide is reduced to silver; thereafter or simultaneously heating said element to form a diffusible dye; and transferring the diffusible dye image to a dye fixing element, wherein the photosensitive element or the dye fixing element further comprises at least one of a compound of which the quenching rate constant for the excited triplet of arylazonaphthol yes is at least 1.times.10.sup.5 M.sup.-1 .multidot.sec.sup.-1 and a compound of which the quenching rate constant for singlet state oxygen is at least 1.times.10.sup.7 M.sup.-1 .multidot.sec.sup.-1.