Patents by Inventor Rudolf Preussmann

Rudolf Preussmann 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).

  • Reduction of nitrosamine formation in the vulcanization of rubbers
    Patent number: 5158805
    Abstract: A method for reducing the formation of nitrosamines during the vulcanization of rubber mixes which includes treating of the inorganic additives used for the rubber mix to be vulcanized--primarily carbon blacks, zinc oxide and/or silicates--with ammonia or with a primary amine.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: October 27, 1992
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Rudolf Preussmann, Bertold Spiegelhalder