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. 27, 1986
Filed:
Sep. 14, 1984
Syoji Matsuzaka, Hino, JP;
Makoto Kajiwara, Odawara, JP;
Masanobu Miyoshi, Odawara, JP;
Kiyoshi Yamashita, Hino, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
Improved process for preparing silver chlorobromide or silver chloroiodobromide emulsion wherein first silver ion solution and second halide ion solution are mixed by double jet method and mole % of silver bromide, silver chloride and silver iodide are in specified range, characterized in that molar ratio of Br.sup.- :Cl.sup.- :I.sup.- in second solution is within specified range and further step is included to produce silver halide with control of silver ion concentration by using third solution containing Br.sup.- and Cl.sup.-. Such emulsions have sufficiently narrow grain diameter distribution and silver halide composition distribution, with constant productivity.