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:
Mar. 20, 1990
Filed:
Nov. 23, 1987
Keiji Ogi, Hino, JP;
Atushi Kamitakahara, Hino, JP;
Konica Corporation, Tokyo, JP;
Abstract
A direct positive light-sensitive silver halide photographic material having at least one silver halide emulsion layer containing at least two kinds of internal latent image type silver halide grains not previously fogged and having the same spectral sensitivity, and capable of obtaining a direct positive image by effecting surface development while applying and/or after applying overall exposure after imagewise exposure; wherein said at least two kinds of internal latent image type silver halide grains have different sensitivity from each other and at least one of silver halide grains having lower sensitivity is desensitized with use of an organic or inorganic desensitizer, and a method of use of the direct positive light-sensitive silver halide photographic material for carrying out development at a higher temperature.