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:
Aug. 03, 1993
Filed:
Sep. 19, 1991
Kiyoshi Morimoto, Kanagawa, JP;
Takashi Toyoda, Kanagawa, JP;
Fuji Photo Film Co. Ltd., Kanagawa, JP;
Abstract
Disclosed is a method for the development of a silver halide light-sensitive black and white material, wherein a silver halide light-sensitive material is developed in the presence of at least one compound represented by the following general formula (I): ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, an ammonium group or a group which is cleaved under alkaline conditions; L represents a bivalent organic group comprising an alkylene group, an alkenylene group, an ether group, a thioether group, --CO--, --CS-- or --NR-- (wherein R represents a hydrogen atom or an alkyl group) alone or a combination of two or more of them; X represents an amino group, an ammonio group, a hydroxyl group or a heterocyclic group; and n represents 0 or 1.