Patents by Inventor Richard Krabetz

Richard Krabetz 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).

  • Recovering anhydrous acrylic acid
    Patent number: 3932500
    Abstract: Acrylic acid practically devoid of water, acrolein, formaldehyde and acetic acid is obtained at particularly low cost by countercurrent scrubbing and quenching of the reaction gas formed in the catalytic oxidation of propylene and/or acrolein with a high-boiling, extremely hydrophobic solvent followed by processing of the extract.
    Type: Grant
    Filed: July 17, 1972
    Date of Patent: January 13, 1976
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Gerd Duembgen, Heinz Engelbach, Walter Frey, Richard Krabetz, Ulrich Lebert, Hermann Spitzl, Fritz Thiessen, Carl-Heinz Willersinn