Patents by Inventor Alfred Weindl

Alfred Weindl 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).

  • Patent number: 4551294
    Abstract: The novel molding compositions with vinyl chloride polymer as the main constituent contain, in a specific quantity in each case, certain impact strength modifiers, polymethyl methacrylate and a special cellulose, namely powdered pure cellulose having a mean degree of polymerization of 300 to 1,000 and a maximum particle diameter of 0.09 mm. These molding compositions can readily be calendered. The films are particularly suitable for the production of forgery-proof valuable documents which can be personalized by means of a laser, for example credit cards.
    Type: Grant
    Filed: October 4, 1984
    Date of Patent: November 5, 1985
    Assignee: Heochst Aktiengesellschaft
    Inventors: Bernhard Wottka, Alfred Weindl