Patents by Inventor Christel Siemann

Christel Siemann 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).

  • Pharmaceutical preparations containing estra-1,3,5(10)-triene derivatives
    Patent number: 6841548
    Abstract: The invention concerns pharmaceutical preparations containing estra-1,3,5(10)-triene derivatives as active ingredients which carry a group of the general formula R—SO2—O— at their C3 position wherein R is a R1R2N group wherein R1 and R2 are independent of each other and represent a hydrogen atom, a C1-C5 alkyl radical or, together with the N atom, a polymethylene imino radical containing 4 to 6 C atoms, or a morpholino radical. The preparations according to the invention can be used for hormonal contraception and for hormon replacement therapy (HRT). They exhibit a low hepatic estrogenity.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: January 11, 2005
    Assignee: Schering AG
    Inventors: Sigfrid Schwarz, Walter Elger, Christel Siemann, Gudrun Reddersen, Birgitt Schneider, Hans-Joachim Siemann
  • Pharmaceutical preparations containing estra-1,3,5(10)-triene derivatives
    Publication number: 20020061868
    Abstract: The invention concerns pharmaceutical preparations containing estra-1,3,5(10)-triene derivatives as active ingredients which carry a group of the general formula
    Type: Application
    Filed: November 21, 2001
    Publication date: May 23, 2002
    Inventors: Sigfrid Schwarz, Walter Elger, Christel Siemann, Gudrun Reddersen, Birgitt Schneider