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. 07, 1993
Filed:
Apr. 26, 1991
Katsumi Hirano, Minami-Ashigara, JP;
Mikio Ihama, Minami-Ashigara, JP;
Hiroyuki Mifune, Minami-Ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
In a silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support, light-sensitive silver halide grains contained in the silver halide emulsion layer have been subjected to selenium sensitization, and the silver halide emulsion layer or another hydrophilic colloid layer which is in a water-permeable relationship with the silver halide emulsion layer contains at least one compound represented by formula (I) (wherein Z represents a heterocyclic ring directly or indirectly having at least one substituent group selected from the group consisting of --SO.sub.3 M, --COOR.sub.1, --OH, and --NHR.sub.2, M represents hydrogen, alkali metal, quaternary ammonium, or quaternary phosphonium, R.sub.1 represents hydrogen, alkali metal, or alkyl having 1 to 6 carbon atoms, R.sub.2 represents hydrogen, alkyl having 1 to 6 carbon atoms, --COR.sub.3, --COOR.sub.3, or --SO.sub.2 R.sub.3, and R.sub.3 represents hydrogen, aliphatic, or aromatic): ##STR1##
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile