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:
Apr. 09, 1985
Filed:
Sep. 07, 1983
Syoji Matsuzaka, Hino, JP;
Makoto Kajiwara, Odawara, JP;
Masanobu Miyoshi, Odawara, JP;
Kiyoshi Yamashita, Hino, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
A silver halide photographic emulsion, which comprises (i) a mono-dispersed silver halide emulsion comprising 3 to 50 mole % of silver chloride, 1 mole % or less of silver iodide and 50 to 97 mole % of silver bromide having a grain size distribution of 0.15 or less in terms of the coefficient of variation S/r (where S is standard deviation and r is mean grain diameter), and (ii) a coupler represented by the following formula: ##STR1## wherein X represents an organic group which is bonded through an oxygen atom, a nitrogen atom or a sulfur atom to the coupler and is eliminable during the coupling reaction with an oxidized product of a color developing agent; Y represents a halogen atom, an alkoxy group, an aryloxy group, a diacylamino group or an alkyl group; R represents a trifluoromethyl group, an acylamino group, a sulfonamide group, a ureido group, an alkyl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group or an imide group, which is bonded to the anilide group at the 4- or 5-position.