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:
Jun. 24, 1997
Filed:
Oct. 26, 1995
Seiji Yamashita, Minami Ashigara, JP;
Takayoshi Oyamada, Minami Ashigara, JP;
Mitsuo Saitou, Minami Ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A process for producing a silver halide emulsion comprising tabular silver halide grains containing not less than 10 mol% of silver chloride and having {100} faces as major faces and an average aspect ratio of 2 or higher, which tabular silver halide grains are prepared by comprising rising temperature of a grain formation system after completion of (a) nucleation step and taking (c) grain growth step, which process comprises adding silver ions in an amount corresponding to at least 1 mol% of the total silver content to the silver halide emulsion at a stage after introduction of a halogen gap in the nucleation step (a) and before the grain growth step (c).