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:
Jan. 17, 1984
Filed:
Mar. 31, 1983
Junji Minamizono, Minami-ashigara, JP;
Mitunori Hirano, Minami-ashigara, JP;
Yoshiro Kawashima, Minami-ashigara, JP;
Tadashi Ogawa, Minami-ashigara, JP;
Fuji Photo Film, Co., Ltd., Minami-ashigara, JP;
Abstract
A silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer. The material contains at least one compound selected from the group consisting of a compound represented by the following general formula (I) and a compound represented by the following general formula (II) in at least one layer of the silver halide emulsion layer and other hydrophilic colloid layers thereof; ##STR1## wherein R represents an alkyl group having 1 to 6 carbon atoms which may be substituted, an aryl group having 6 to 11 carbon atoms which may be substituted, or an aralkyl group having 7 to 12 carbon atoms which may be substituted; A represents a .sigma. bond or a divalent connecting group which links R and the nitrogen atom; R.sub.1 and R.sub.2 are independently hydrogen, an alkyl group having 1 to 6 carbon atoms which may be substituted, or an aralkyl group having 7 to 11 carbon atoms which may be substituted, or when A represents a .sigma. bond, R.sub.1 and R.sub.2 each may represent an atomic group necessary to form a heterocyclic ring containing the quaternary nitrogen atom together with R; a and b each represents 0 or a positive integer, provided that a and b are not both 0; R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represents hydrogen or an alkyl group having 1 to 6 carbon atoms which may be substituted and when b is not 0, at least one of R.sub.5 and R.sub.6 is a different group from R.sub.3 or R.sub.4 ; B represents --COO or --SO.sub.3 ; and Z represents an atomic group necessary to form a heterocyclic ring. The photographic light-sensitive material has a high sensitivity without being accompanied by an undesirable increase in the formation of fog.