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. 09, 1977
Filed:
May. 19, 1976
Junichi Matsuyama, Minami-ashigara, JA;
Masanao Hinata, Minami-ashigara, JA;
Akira Sato, Minami-ashigara, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
A silver halide photographic emulsion containing at least one sensitizing dye of the following general formula (I) and at least one sensitizing dye of general formulae (II) and/or (III), in an amount effective to achieve supersensitization: ##STR1## wherein V.sup.1 and V.sup.2, which may be the same or different, each represents a hydrogen atom, halogen atom, trifluoromethyl, cyano, carboxy, alkoxycarbonyl, aminosulfonyl or alkylsulfonyl; W.sup.1 and W.sup.2, which may be the same or different, each represents a hydrogen atom, halogen atom, alkyl, alkoxy, hydroxy, acyloxy or phenyl; R.sup.1 represents alkyl or substituted alkyl; R.sup.2 and R.sup.3, which may be the same or different, each represents alkyl or substituted alkyl, and at least one of R.sup.2 and R.sup.3 represents 1 or 0; substituted alkyl containing a carboxy or sulfo radical; R.sup.4 and R.sup.5, which may be the same or different, each has the same meanings as R.sup.1 ; X.sup.- represents an acid anion; and m represents ##STR2## wherein V.sup.3 and V.sup.4, which may be the same or different, each has the same meaning as V.sup.1 and V.sup.2 ; W.sup.3 and W.sup.4, which may be the same or different, each has the same meaning as W.sup.1 and W.sup.2 ; R.sup.6 has the same meaning as R.sup.1 ; R.sup.7 and R.sup.8, which may be the same or different, each has the same meaning as R.sup.2 and R.sup.3 ; X.sup.- represents an acid anion; and n represents 1 or 0; ##STR3## wherein W.sup.5 and W.sup.6, which may be the same or different, each has the same meaning as W.sup.3 and W.sup.4 ; R.sup.10 and R.sup.11, which may be the same or different, each has the same meaning as R.sup.2 and R.sup.3 ; R.sup.9 represents an alkyl group; X.sup.- represents an acid anion; and p represents 1 or 0.