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:
Nov. 28, 1995
Filed:
Oct. 17, 1994
Toshiyuki Marui, Tokyo, JP;
Konica Corporation, , JP;
Abstract
Disclosed is a light-sensitive silver halide X-ray photographic material comprising a mixture of tabular silver halide grains, wherein tabular silver halide grains of 0.6 .mu.m to 1.5 .mu.m in an average grain size are contained in a proportion of 70% to 95% and of 0.3 .mu.m to 0.5 .mu.m in a proportion of 5% to 30%; the aspect ratio of tabular grains is more than 3; and having sensitometric properties in which a gamma (.gamma.1) formed by a straight line portion between two points 0.5 and 1.5 of optical density is 2.7 to 3.3 and a gamma (.gamma.2) formed by a straight line portion between points 2.0 ana 3.0 of optical density is 1.5 to 2.5 in the characteristic curve of a rectangular coordinate system having equal coordinate axis unit lengths for the optical density (D) and the amount of exposure (log E). A light-sensitive silver halide X-ray photographic material according to this invention has a superior diagonostic performance, and is improved in sharpness and graininess and also improved in pressure resistance.