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:
Dec. 26, 1995
Filed:
Jan. 09, 1995
Hideo Ikeda, Minami-Ashigara, JP;
Takefumi Hara, Minami-Ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An emulsion contains tabular silver halide having a thickness of less than 0.5 .mu.m, a diameter of 0.3 .mu.m or more, and a grain diameter/thickness ratio of 2 or more. The tabular silver halide grains account for at least 50% of a total projected area of all silver halide grains. 50% (number) or more of the tabular silver halide grains include 10 or more dislocations per grain. A relative standard elevation of silver iodide content of individual tabular silver halide 30% or less. This light-sensitive silver halide emulsion has a high sensitivity and a high gamma improved in photographic properties and in rate of development. Each tabular silver halide grain may internally have a portion where a silver iodide content is higher than that of the surface of the grain. When the light-sensitive silver halide emulsion is added to a silver halide emulsion layer, a photographic light-sensitive material having a high sensitivity and a high gamma and improved in photographic properties and in rate of development can be obtained.