Patents by Inventor Helmut Springer

Helmut Springer 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).

  • Process for the manufacture of .beta.-(dimethylamino)-propionitrile
    Patent number: 4172091
    Abstract: An improvement in a process for the manufacture of .beta.-(dimethylamino)-propionitrile by contacting acrylonitrile with dimethylamine, the improvement residing in passing the reactants in countercurrent with respect to one another in a bubble column reactor and reacting them therein at a temperature between 25.degree. and 80.degree. C., preferably 40.degree. to 60.degree. C.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: October 23, 1979
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Jurgen Weber, Helmut Springer, Boy Cornils, Hans Feichtinger, Wolfgang Payer