Patents by Inventor Erhard Jury

Erhard Jury has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparing a matte, photosensitive silver halide recording material
    Patent number: 5420006
    Abstract: Photosensitive matting agents for photosensitive recording materials that are known can be prepared only at considerable expense. A much simplified process involves preparing a photosensitive matte material from photoinsensitive matting agent particles by incorporating the particles into the starting solutions for the silver halide precipitation. The invention is particularly useful in reprography and in medical diagnostics.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: May 30, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Erhard Jury
  • Process for producing photographic silver halide emulsions having a core/shell structure
    Patent number: 4070190
    Abstract: The invention is a process of producing a lithographic silver halide emulsion having a core/shell structure exhibiting improved halftone dot quality and increased photographic speed, comprising: (1) precipitating a silver chloride emulsion in a protective colloid, (2) converting said silver chloride emulsion to a silver bromide emulsion, and (3) precipitating a silver chloride shell on the surfaces of the silver bromide grains.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: January 24, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Wolfgang Friedrich, Horst Friedel, Erhard Jury