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:
May. 19, 1998
Filed:
Oct. 11, 1996
Toshiyuki Takabayashi, Hino, JP;
Hirohide Ito, Hino, JP;
Konica Corporation, , JP;
Abstract
A silver halide black-and-white photographic light sensitive material is disclosed, comprising a support provided on one side thereof photographic component layers comprising at least two, first and second silver halide emulsion layers and optionally a nonlight-sensitive hydrophilic colloidal layer, the first emulsion layer being provided closer to the support than the second emulsion layer, wherein two or more layers of the component layers, each contains a hydrazine compound; and a molar ratio of a total hydrazine content of all layer(s) closer to the support from the first emulsion layer which include the first emulsion layer to that of all layer(s) farther from the support than the first emulsion layer which include the second emulsion layer is 0.2 to 0.8.