Patents by Inventor Siegfrid Drewes

Siegfrid Drewes 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).

  • Pentene-diphenyl-diglucoside containing compound
    Patent number: 4652636
    Abstract: The invention relates to the treatment and prevention of cancerous conditions by the administration of a composition including the compound of the formula: ##STR1## or of an aqueous, alcoholic or aqueous alcoholic or other extracts of plants of the Hypoxidaceae family and particularly the plants of the genus Hypoxis and the genus Spiloxene.
    Type: Grant
    Filed: May 2, 1985
    Date of Patent: March 24, 1987
    Assignee: Roecar Holdings
    Inventors: Siegfrid Drewes, Roelof W. Liebenberg