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:
Sep. 24, 1991
Filed:
Jul. 12, 1989
Applicant:
Inventors:
Fumitaka Terai, Saitama, JP;
Hiroyuki Yamagami, Kanagawa, JP;
Nobuhiko Uchino, Kanagawa, JP;
Masaki Okazaki, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430569 ; 430546 ; 430570 ;
Abstract
A process for preparing a silver halide emulsion, which comprises dissolving one or more substantially water-insoluble photographic additives in a heated solution of an organic solvent containing a surfactant having a hydrophilic --CO.sub.3 or --OSO.sub.3 group to completely dissolve the one or more substantially water-insoluble additives, cooling the resulting solution to precipitate crystals, separating the crystals from the solution, drying the separated crytals, dispersing said crystals in water and adding the resulting dispersion to a silver halide emulsion.