Patents by Inventor Reinhold Plass

Reinhold Plass 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: 3975400
    Abstract: Method of producing .gamma.-butyrolactams by reacting .gamma.-butyrolactones with ammonia in the presence or absence of water at elevated temperatures and pressures. The reaction is carried out continuously at temperatures ranging from to whilst maintaining pressures which are at least 10 percent higher than the pressure equal to the sum of the partial pressures of the reactants at the temperature used. .gamma.-Butyrolactams are valuable intermediates, for example in the manufacture of polymers, pharmaceuticals and solvents.
    Type: Grant
    Filed: February 21, 1973
    Date of Patent: August 17, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Walter Himmele, Ernst Hofmann, Herwig Hoffmann, Reinhold Plass