Patents by Inventor Dietrich Schirmer

Dietrich Schirmer 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).

  • Method for the reprocessing of condensate from urea production plants
    Patent number: 4387029
    Abstract: An improvement in a method for the reprocessing, by oxidation, of condensate obtained in urea production plants and having a urea content of approximately 50 mg/l and a biuret content of approximately 2 mg/l, is disclosed. The improvement comprises performing the oxidation at elevated temperatures and at alkaline pH values; preferably, the oxidation is performed at a temperature greater than 60.degree. C. and a pH value greater than 8.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: June 7, 1983
    Assignee: UHDE GmbH
    Inventors: Adalbert Huber, Dietrich Schirmer, Heiko Hoffmann