Patents by Inventor Hans Eberhard Praetzel

Hans Eberhard Praetzel 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).

  • Self-extinguishing acrylonitrile-butadiene-styrene moulding composition
    Patent number: 3962164
    Abstract: Flame-proofing acrylonitrile-butadiene-styrene (ABS) polymers by incorporating therein certain mono and diphenyl aromatic bromine compounds such as octabromodiphenyl, antimony trioxide or antimony oxychloride and optionally an organo chlorine compound.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: June 8, 1976
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Hans Eberhard Praetzel, Herbert Jenkner