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. 18, 1981
Filed:
May. 09, 1980
Junkichi Ogawa, Minami-ashigara, JP;
Mitsugu Tanaka, Minami-ashigara, JP;
Minoru Yamada, Minami-ashigara, JP;
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Abstract
A method is described for forming a black-and-white photographic image consisting essentially of a silver image and a coextensive dye image, in which the maximum density of the image and the fastness of the image to light are greatly improved, by processing a silver halide photosensitive material which contains silver halide in a reduced amount (compared with conventional materials) that has been imagewise exposed to light in the presence of a naphthalene compound containing at least two hydroxy substituents groups on the nucleus thereof and a p-phenylenediamine type developing agent or a precursor of the p-phenylenediamine compound.