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:
Oct. 24, 1995
Filed:
Apr. 14, 1993
Satoshi Nagaoka, Minami-ashigara, JP;
Kazuyoshi Yamakawa, Minami-ashigara, JP;
Mitsuru Yamamoto, Minami-ashigara, JP;
Makoto Suzuki, Minami-ashigara, JP;
Yasuhiro Shimada, Minami-ashigara, JP;
Katsuro Nagaoka, Minami-ashigara, JP;
Hideo Ikeda, Minami-ashigara, JP;
Takefumi Hara, Minami-ashigara, JP;
Sadanobu Shuto, Minami-ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
There is disclosed a silver halide color photographic material having a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a blue-sensitive silver halide emulsion layer, which comprises a cyan dye-forming coupler represented by formula (Ia) and (a) a sensitizing dye containing a sulfonamide group, (b) negative-type internal latent image-type silver halide grains chemically sensitized to a defined depth from the surface, (c) grains each having a defined spectral sensitivity distribution and a DIR-hydroquinone, (d) a monodisperse silver halide emulsion, (e) non-photosensitive silver halide emulsion wherein the inside or the surface of grains is fogged, (f) a colloidal silver, or (g) a DIR-hydroquinone: ##STR1## wherein Za represents --NH-- or --CH(R.sub.3)--, Zb and Zc each represent --C(R.sub.4).dbd. or --N.dbd., R.sub.1, R.sub.2, and R.sub.3 each represent an electron-attracting group wherein the Hammett substituent constant .sigma..sub.p value is 0.20 or more, provided that the sum of the .sigma..sub.p value of R.sub.1 and the .sigma..sub.p value of R.sub.2 is 0.65 or more, R.sub.4 represents a hydrogen atom or a substituent, if there are two groups R.sub.4 in the formula, they may be the same or different, and X represents a hydrogen atom or a group capable of being released upon a coupling reaction with the oxidized product of an aromatic primary amine color-developing agent, provided that R.sub.1, R.sub.2, R.sub.3, R.sub.4, or X may be a divalent group to form a homopolymer or a copolymer by bonding with a dimer or higher polymer or polymer chain.