Patents by Inventor Friederich Borchers

Friederich Borchers 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).

  • Method for obtaining estrogens from pregnant mare urine by solid-phase extraction
    Patent number: 5814624
    Abstract: A method for obtaining an extract from urine of pregnant mares containing a natural mixture of conjugated estrogens by solid-phase extraction of the mixture of conjugated estrogens from the urine of pregnant mares on RP silica gel.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: September 29, 1998
    Assignee: Solvay Deutschland GmbH
    Inventors: Ivan Ban, Friederich Borchers, Henning Heinemann, Heinz-Helmer Rasche