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:
Nov. 30, 1992
Filed:
Jan. 17, 1991
Applicant:
Inventor:
Noriyuki Inoue, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430598 ; 430264 ; 430596 ; 430378 ; 430547 ; 430406 ; 430607 ; 430613 ; 430600 ;
Abstract
Disclosed is a direct positive photographic material having an improved time-dependent storage stability. The material comprises a support having thereon at least one photographic emulsion layer containing previously non-fogged internal latent image type silver halide grains wherein the photographic emulsion layer contains at least one compound of formula (I): ##STR1## where R.sup.11 is an aryl group, R.sup.12 to R.sup.15 each are a hydrogen atom, or an aliphatic or aromatic group, and R.sup.11 to F.sup.15 may have substituent(s) and may form ring(s).