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:
Nov. 26, 1991
Filed:
Feb. 08, 1989
Hiroshi Takehara, Kanagawa, JP;
Hideo Ikeda, Kanagawa, JP;
Fumi Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Photosensitive silver halide emulsions are disclosed which comprise photosensitives silver halide grains dispersed in a binder, wherein at least 70% of the total projected area of the silver halide grains is accounted for by tabular grains of a diameter of at least 0.15 .mu.m, wherein the mean aspect ratio of the tabular grains is not more than 8.0, wherein grains in which the value of the ratio (b/a) of the longest distance (a) between two or more parallel twinning planes in the tabular grain and the grain thickness (b) is at least 5 account for at least 50% (in terms of numbers of grains) of all of the tabular grains, and wherein at least 50% (in terms of the numbers of grains) of the tabular grains are grains in which the number of dislocations per grain is at least 10.