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. 21, 1999
Filed:
Nov. 21, 1997
Applicant:
Inventor:
Otto Lapp, Bergisch Gladbach, DE;
Assignee:
Agfa-Gevaert AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; C01G / ;
U.S. Cl.
CPC ...
430569 ; 430567 ; 423 38 ; 423 46 ; 423 42 ;
Abstract
The production of a silver halide emulsion in an aqueous protective colloid solution by the reaction of, on the one hand, silver nitrate, and, on the other, at least one water-soluble halide, may be performed particularly simply and with great apportioning accuracy, if, during at least part of the precipitation, at least the predominant part of one reactant is added in the form of a solid salt to the aqueous protective colloid solution.