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:
Aug. 20, 1991
Filed:
Oct. 31, 1989
Satomi Asano, Tokyo, JP;
Hiroshi Okusa, Tokyo, JP;
Nobuaki Kagawa, Tokyo, JP;
Hirofumi Ohtani, Tokyo, JP;
Syoji Matsuzaka, Tokyo, JP;
Konica Corporation, Tokyo, JP;
Abstract
A silver halide photographic material in which at least one silver halide emulsion layer coated onto a base support has been subjected to supersensitization by the combination of at least one symmetrical carbocyanine dye having two symmetrical heterocyclic structures, at least one other symmetrical carbocyanine dye having two symmetrical heterocyclic structures, and at least one asymmetrical carbocyanine dye having either one of the two heterocyclic structures in the first symmetrical carbocyanine dye and either one of the two heterocyclic structures in the second symmetrical carbocyanine dye. This photographic material has high spectral sensitivity and good storage stability since it is resistant to desensitization due to desorption of spectral sensitizers from silver halides.