Patents by Inventor Erich Brandes

Erich Brandes 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 compressing ketene
    Patent number: 4001332
    Abstract: Ketene is compressed by means of a liquid ring pump using ketene-containing diketene as operating liquid.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: January 4, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Mau, Gunter Jacobsen, Erich Brandes