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:
Jan. 21, 1997
Filed:
Sep. 14, 1995
Applicant:
Inventors:
Makoto Ono, Shizuoka, JP;
Naoto Yanagihara, Shizuoka, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430138 ; 503225 ; 503226 ; 503216 ; 430337 ; 430338 ; 430350 ; 430348 ;
Abstract
An optical image forming material in which the background portions thereof are not color developed (not fogged) during storage in the dark after fixing, comprising a support having thereon at least a coating layer containing (1) microcapsules containing a leuco dye which is form color when it is oxidized and a photooxidizing agent, and (2) a reducing agent and a fixing accelerator present outside of the microcapsules. The reducing agent is a hydroquinone derivative substituted by an alkyl group at each of 2- and 5-positions thereof, and the fixing accelerator is 2,2-bis(4-hydroxy-phenyl)propane.