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:
Feb. 14, 1984
Filed:
Aug. 09, 1982
Applicant:
Inventor:
Martin L Falxa, Cambridge, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430569 ; 430567 ;
Abstract
A method for preparing a narrow-grain size distribution silver iodobromide emulsion which comprises precipitating silver iodobromide grains by simultaneously introducing an ammoniacal solution of silver nitrate and a solution of ammonium bromide into an ammoniacal solution consisting essentially of gelatin and a water-soluble iodide salt under conditions where silver ions are not in excess during said precipitation.