Patents by Inventor Paul Otto Damm

Paul Otto Damm 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).

  • Use of mixtures of polymethyl methacrylate and styrene-acrylonitrile copolymers for the production of laser-inscribed moldings
    Patent number: 6020106
    Abstract: Transparent molded articles having a high-contrast laser inscription thereon are produced from a polymer mixture consisting ofA) from 40 to 99% by weight of a polymer of an alkyl ester of (meth)acrylic acid,B) from 1 to 50% by weight of a copolymer of styrene and acrylonitrile having an acrylonitrile content of from 8 to 30% by weight,C) from 0 to 50% by weight of rubber particles, andD) from 0 to 20% by weight of additives and processing auxiliaries, by preparing a transparent molded article from the polymer mixture, and exposing the transparent molded article to laser radiation.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: February 1, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Graham Edmund Mc Kee, Martin Welz, Andreas Deckers, Daniel Wagner, Paul Otto Damm, Hans-Josef Oslowski