Patents by Inventor Rudolf F. Legler

Rudolf F. Legler 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).

  • Light-sensitive silver halide reproduction material
    Patent number: 4243748
    Abstract: A light-sensitive silver halide reproduction material of high gradation stability which contains a disulfide compound substituted by two heterocyclic radicals, and a thiazolidine compound.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: January 6, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gotz Elsner, Rudolf F. Legler, Margarete Popovici