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. 31, 1991
Filed:
Sep. 07, 1990
Mitsubishi Paper Mills Limited, Tokyo, JP;
Abstract
Disclosed is a silver halide photographic light-sensitive material which has a hydrophilic colloid layer containing at least one of the dyes represented by the following formulas (I) and (II): ##STR1## wherein R.sup.1 and R.sup.2 may be identical or different and each represents an alkyl group; Y.sup.1 and Y.sup.2 may be identical or different and each represents a group of atoms necessary to form a hydrocarbon ring together with the carbon atom at 3-position of indole ring; L represents a methine group; the dye molecule has at least three acid substituents; X.sup..theta. represents an anion; and n is 1 or 2 and is 1 when the dye form an inner salt, ##STR2## wherein R.sub.1 and R.sub.2 may be identical or different and each represents a substituted or unsubstituted alkyl group; Z.sub.1 and Z.sub.2 each represents a group of non-metallic atoms necessary to form a substituted or unsubstituted benzo condensed ring or naphtho condensed ring, with a proviso that R.sub.1, R.sub.2, Z.sub.1 and Z.sub.2 each represents a group which allows the dye molecule to have at least three acid groups; L represents a substituted or unsubstituted methine group; and n is an integer of 1-3.