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. 06, 1994
Filed:
Nov. 29, 1993
Applicant:
Inventors:
Tamotu Iwata, Nagaokakyo, JP;
Seiichi Sumi, Nagaokakyo, JP;
Assignee:
Mitsubishi Paper Mills Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430265 ; 430264 ; 430435 ; 430436 ; 430438 ; 430478 ; 430481 ; 430482 ; 430486 ; 430487 ;
Abstract
The present invention provides a developer for silver halide photographic light-sensitive materials which provides super-high contrast and is improved in stability with time. This developer contains at least (1) a developing agent, (2) 10 g/l or more of a hydroquinonemonosulfonate, (3) 0.3 mol/l or more of a sulfite and (4) an amino compound in an amount necessary to accelerate enhancement of contrast and has a pH of 10.5-12.3.