Patents by Inventor Hermann Richtzenheim

Hermann Richtzenheim 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).

  • Butyric acid esters
    Patent number: 3980697
    Abstract: Butyric acid esters of the formula: ##EQU1## wherein each R is alkyl, alkyl having an alkoxy substituent, or cycloalkyl, and the R's are the same. The esters are prepared by contacting an allyl halide with carbon monoxide, an alcohol of the formula ROH wherein R is as above, and an alkali alcoholate of the same alcohol, in the presence of a catalyst for the reaction at a pH of 10-14. The esters are useful as solvents for polymers and as plasticizers.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: September 14, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Moustafa El-Chahawi, Uwe Prange, Hermann Richtzenheim, Wilhelm Vogt