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. 29, 1993
Filed:
Aug. 22, 1991
Atsushi Matsunaga, Kanagawa, JP;
Takanori Hioki, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Disclosed is a silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): ##STR1## wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; l.sub.1 represents an integer 1 or 2; l.sub.2 represents an integer 0 or 1, l.sub.3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce ##STR2## A silver halide photographic material is also disclosed which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions and having a localized phase with a high iron ion concentration and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10.sup.-5 torr and when it is developed after exposure in air under 760 torr: ##STR3## wherein MET, Q, l.sub.1, l.sub.2, and l.sub.3 are as defined for formula I and Ar' represents an aromatic polycyclic group formed of 8 or more atoms.