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:
Apr. 27, 1976
Filed:
Jul. 16, 1974
Masanao Hinata, Minami-ashigara, JA;
Haruo Takei, Minami-ashigara, JA;
Akira Sato, Minami-ashigara, JA;
Masao Takano, Minami-ashigara, JA;
Nobuaki Miyasaka, Minami-ashigara, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
A silver halide photographic emulsion containing in a supersensitizing amount the combination of at least one sensitizing dye represented by the general formula (I) ##SPC1## wherein, A.sub.1, A.sub.2, A.sub.3 and A.sub.4 each represents a member selected from the group consisting of a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom, a hydroxyl group, an aryl group, a carboxyl group, an alkoxycarbonyl group, a cyano group, a trifluoromethyl group, an amino group, an acylamide group, an acyloxyl group, an alkoxycarbonylamino group, and a carbalkoxy group; and A.sub.1 and A.sub.2 and A.sub.3 and A.sub.4 can combine to form a naphthoxazole nucleus; R.sub.o represents a hydrogen atom, a lower alkyl group or an aryl group; R.sub.1 and R.sub.2 each represents an alkyl group, provided that at least one of R.sub.1 or R.sub.2 represents a sulfoalkyl group; X.sub.1 represents an anion; and n is equal to 1 or 2 with n being equal to 1 when the sensitizing dye forms an intromolecular salt, and at least one sensitizing dye represented by the general formula (II) ##SPC2## wherein, Z.sub.1 and Z.sub.2 each represents the non-metallic atoms necessary to form a nucleus selected from the group consisting of a thiazole nucleus, a thiazoline nucleus, an oxazole necleus, a selenazole nucleus, a 3,3-dialkylindolenine nucleus, and an imidazole nucleus; R.sub.3 and R.sub.4 each represents an alkyl group; X.sub.2 represents an anion; m is equal to 1 or 2 with m being equal to 1 when the sensitizing dye forms an intramolecular salt.