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. 31, 1976
Filed:
Dec. 06, 1974
Masanao Hinata, Minami-ashigara, JA;
Haruo Takei, Minami-ashigara, JA;
Akira Sato, Minami-ashigara, JA;
Atsuo Iwamoto, Minami-ashigara, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye of the following general formula (I) ##EQU1## WHEREIN Z.sub.1 and Z.sub.2 each represents an atomic group required to form a quinoline ring; R.sub.1 and R.sub.2 each represents an aliphatic group, with at least one of R.sub.1 and R.sub.2 being a hydroxyalkyl group, an alkyl group containing a carboxyl group or an alkyl group containing a sulfo group; X.sub.1 is an acid anion; and m is 1 or 2, and when m is 1 the dye forms an intramolecular salt and at least one sensitizing dye of the following general formula (II) ##EQU2## WHEREIN Z.sub.3 represents an atomic group required to form a benzimidazole ring, a benzoxazole ring or a .beta.-naphthoxazole ring; Z.sub.4 represents an atomic group required to form a benzothiazole ring, a benzoselenazole ring, a .beta.-naphthothiazole ring or a .beta.-naphthoselenazole ring; R.sub.3 and R.sub.4 each represents an aliphatic group with at least one of R.sub.3 and R.sub.4 being an alkyl group containing a carboxyl group, a hydroxyalkyl group or an alkyl group containing a sulfo group; R.sub.5 represents a hydrogen atom or an alkyl group; X.sub.2 is an acid anion group; and n is 1 or 2, and when n is 1 the dye forms an intramolecular salt.