Patents by Inventor Karl W. Schranz

Karl W. Schranz 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 troublefree coating of hydrophobic materials with polyurethanes
    Patent number: 4948634
    Abstract: The present invention relates to a process for troublefree, i.e. flaw-free and uniform, coating of a support which can accept a large amount of electrostatic charge, such as, for example, polycarbonate foils, with a solution of fully reacted polyurethane in organic solvents, more precisely after prior coating of the polycarbonate foil with an organic solution of the sodium salt of polystyrenesulphonic acid.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: August 14, 1990
    Assignee: Miles Inc.
    Inventors: Walther Cohnen, Alexander Riebel, Karl W. Schranz
  • Process for the development of color photographic images with p-dialkylaminoaniline color developers
    Patent number: 4322492
    Abstract: The process for the development of color photographic images with an aqueous alkaline color developer mixture comprising methyl-p-dialkylaminoaniline derivates. The process provides brilliant color photographic images avoiding coloration of the support and color fog even when processing at high temperatures.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: March 30, 1982
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventors: Friedrich-Wilhelm Kunitz, Walter Puschel, Karl W. Schranz