Patents by Inventor Hewig Hoffmann

Hewig Hoffmann 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).

  • Manufacture of derivatives of malondialdehyde
    Patent number: 3974159
    Abstract: Compounds of the general formula ##EQU1## which may be used in place of malondialdehyde in synthesis reactions are obtained in a one-step reaction form dimethylformamide, phosgene and an alkyl vinyl ether.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: August 10, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Decker, Willibald Schoenleben, Herbert Toussaint, Hewig Hoffmann