Patents by Inventor Willi Oettinger

Willi Oettinger 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).

  • Production of carbon by eliminating hydrogen halide from polymerized halohydrocarbons
    Patent number: 3960768
    Abstract: Hard abrasion-resistant carbon is obtained from polymerized halohydrocarbons by elimination of hydrogen halide in a two-stage process carried out so that in the first decomposition stage, which is carried out at temperatures within the range from 140.degree. to 250.degree.C, a definite amount (not less than 5% by weight and not more than 50% by weight) of the total amount of hydrogen halide capable of being split off is removed. Appropriately shaped end products can be obtained by using raw materials having a globular, cylindrical or other shape. The carbon obtained is suitable as the stationary phase for chromatographic separation and analysis of mixtures.
    Type: Grant
    Filed: July 5, 1974
    Date of Patent: June 1, 1976
    Assignee: Sirmac Ltd.
    Inventors: Willi Ripperger, Willi Oettinger, Rudolf Kaiser, Klaus Pfitzner, Richard Adolf Palm