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. 24, 1992
Filed:
Aug. 07, 1991
George F Wu, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
The incorporation of dopant during the precipitation of silver halide grains. The silver halide grains are formed by a double jet, accelerated flow technique. After addition of about 65 to 90% of the silver halide mass to be precipitated, a dopant solution of an Group VIB salt in an amount of between about 0.2 and about 1.0 mg salt per mole of silver is added to the precipitation dispersion. The dispersion formation is then allowed to complete by continuing the double jet precipitation technique until a desired grain size is reached. Grains formed by this process will have their outer third comprising the Group VI metal salt with the silver halide. In the preferred method the Group VIB metal salt added is a selenium salt comprising potassium selenocyanate.