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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.:

US 4439520 B1

PDFFull Text
Date of Patent:
Mar. 27, 1984

Filed:

Sep. 30, 1982

Sensitized high aspect ratio silver halide emulsions and photographic

Applicant:
Inventors:

James T Kofron, Rochester, NY (US);

Robert E Booms, Churchville, NY (US);

Cynthia G Jones, Bergen, NY (US);

John A Haefner, Webster, NY (US);

Herbert S Wilgus, Conesus, NY (US);

Francis J Evans, Rochester, NY (US);

Assignee:

Eastman Kodak Company, Rochester, NY (US);

Attorney:

Thomas; Carl O.

Primary Examiner:

Mary F Downey

Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430434 ; 430495 ; 430496 ; 430502 ; 430503 ; 430567 ; 430564 ; 430569 ; 430570 ; 430599 ; 430603 ; 430605 ;
Abstract

High aspect ratio chemically and spectrally sensitized tabular grain silver halide emulsions, photographic elements incorporating these emulsions, and processes for the use of the photographic elements are disclosed. In the tabular grain emulsions the silver halide grains having a thickness of less than 0.3 micron and a diameter of at least 0.6 micron have a high aspect ratio and account for at least 50 percent of the total projected area of the silver halide grains present.

Find Patent Forward Citations

Kofron, James. (1984). Sensitized high aspect ratio silver halide emulsions and photographic (U.S. Patent No. 4439520). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4439520

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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