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:
May. 23, 1995
Filed:
Mar. 19, 1993
Yoichi Suga, Minami-ashigara, JP;
Makoto Kikuchi, Minami-ashigara, JP;
Morio Yagihara, Minami-ashigara, JP;
Hisashi Okamura, Minami-ashigara, JP;
Hiroshi Kawamoto, Minami-ashigara, JP;
Fuji Photo Film Co. Ltd., Kanagawa, JP;
Abstract
A silver halide photographic emulsion, in which silver halide grains have been formed while iodide ions are rapidly being generated in a reactor vessel to form a silver iodide-containing region in the silver halide grains, and the silver halide grains have been spectrally sensitized by a sensitizing dye represented by the following formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2.sup.- represent non-metallic atom group which form a 5- or 6-membered heterocyclic ring having nitrogen atom and carbon atom in the ring, R.sub.3 and R.sub.4 represent alkyl groups, X.sub.1.sup.- represents an anion, and p represents 1 or 2.