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. 21, 1992
Filed:
Mar. 28, 1989
Shigeru Ohno, Minami-ashigara, JP;
Yuji Mihara, Minami-ashigara, JP;
Keiichi Adachi, Minami-ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The present invention relates to a dye represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, each represents a C.sub.1 -C.sub.5 alkyl group or a C.sub.1 -C.sub.5 alkyl group having a substituent selected from the group consisting of a sulfonic group, carboxyl group and hydroxyl group, and Z.sup.1 and Z.sup.2 each represents a group of non-metallic atoms necessary for the formation of a benzo-condensed of naphtho-condensed ring, or a benzo-condensed or naphtho-condensed ring having a substituent selected from the group consisting of a sulfonic group, a carboxyl group, an hydroxyl group, a halogen atom, a cyano group, an amino group and a C.sub.1 -C.sub.5 alkyl group connected to the ring directly or through a divalent connection group, with a proviso that R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, Z.sup.1 and Z.sup.2 represent those groups which permit the dye molecule to have at least three acid radicals; L represents a methine group of a methine group having a substituent selected from the group consisting of a C.sub.1 -C.sub.5 alkyl group, a C.sub.1 -C.sub.5 alkyl group having a substituent selected from an hydroxyl group, a phenyl group, or a sulfo group, a halogen atom, a phenyl group, a 4-chlorophenyl group, and a C.sub.1 -C.sub.2 alkoxyl group; X represents an anion; and n represents 1 or 2, n being 1 when the dye forms an inner salt.