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:
Sep. 05, 1989
Filed:
Aug. 09, 1988
Yutaka Kaneko, Sagamihara, JP;
Kenzi Kadokura, Hachioji, JP;
Toyoki Nishijima, Odawara, JP;
Kaoru Onodera, Sagamihara, JP;
Abstract
A silver halide photographic light sensitive material, which contains at least one magenta dye image forming coupler expressed by the following general formula [I], at least one piperazine or homopiperazine compound expressed by the following general formula [XIIIa], at least one compound selected from a coumarane or a chroman compounds expressed by general formula [XIIIa] and hydroxyindane compounds expressed by [XIIIb], below, is described as being stable to light and moisture, and featuring an excellent color reproducibility. ##STR1## The effect of the invention is further improved by additionally employing a metallic compound wherein an optical quenching rate of singlet oxygen is more than 3.times.10.sup.7 M.sup.-1 .multidot.sec.sup.-1.