Patents by Inventor Heinz Quambusch

Heinz Quambusch 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).

  • Photographic recording material
    Patent number: 4978607
    Abstract: A photographic recording material which comprises at least one gelatin-containing silver halide emulsion layer and at least one protective layer containing a gelatin derivative, the protective layer being further away from the layer support than each silver halide emulsion layer and 30 to 90% of the amino groups of the gelatin in the gelatin derivative being reacted with a monofunctional acid derivative, and which is hardened with an instant hardener can be produced at high speed and, hence, at high drying temperatures without any reticulation grain occurring during processing.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: December 18, 1990
    Assignee: AGFA-Gevaert Aktiengessellschaft
    Inventors: Edouard Roche, Wolfgang Himmelmann, Hans-Theo Buschmann, Heinz Quambusch