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:
Oct. 26, 1999
Filed:
Feb. 17, 1998
Takashi Usami, Kanagawa, JP;
Junji Nishigaki, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A heptamethine cyanine compound is represented by the formula (I): in which each of Z.sup.1 and Z.sup.2 is an atomic group that forms a five or six-membered heterocyclic ring or a five or six-membered heterocyclic ring condensed with benzene ring or naphthalene ring; each of R.sup.1 and R.sup.2 is an alkyl group or a substituted alkyl group; each of Y.sup.1 and Y.sup.2 is carboxyl, a sulfonamido group or a sulfamoyl group; X is an anion; and n is 0 or 1. The present specification also discloses a near infrared absorbing ink, a near infrared absorbing sheet and a silver halide photographic material using the heptamethine cyanine compound as a near infrared absorbing dye.