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:
Jun. 09, 1981
Filed:
Feb. 01, 1980
Applicant:
Inventors:
Hiroyuki Mifune, Minami-ashigara, JP;
Shunji Takada, Minami-ashigara, JP;
Yoshitaka Akimura, Minami-ashigara, JP;
Yoshiharu Fuseya, Minami-ashigara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430264 ; 430267 ; 430423 ; 430425 ; 430438 ; 430439 ; 430440 ; 430441 ; 430442 ; 430445 ; 430446 ; 430599 ; 430600 ; 430603 ; 430949 ;
Abstract
A method of forming an extremely high-contrast negative photographic image which comprises image-wise exposing a photographic light-sensitive material comprising a support having thereon a mono-disperse silver halide emulsion layer containing surface latent image type silver halide grains and also containing a compound represented by the following general formula (1):