Patents by Inventor Hans J. Palmen

Hans J. Palmen 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).

  • Thermoplastic film for use in the manufacture of forgery-resistant identification documents
    Patent number: 4381329
    Abstract: A thermoplastic protective film for use in the manufacture of forgery-resistant identification documents, comprising a base layer and a cover layer comprising a partially hydrolyzed olefin/vinyl ester copolymer. The cover-layer side of the film is laminated under the action of heat to the identification document.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: April 26, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hermann Dallmann, Hans J. Palmen