Patents by Inventor Joachim Strecke

Joachim Strecke 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).

  • 14,15-Methylene derivatives of the estrane series and methods for preparing same
    Patent number: 4231946
    Abstract: Compounds of the general formula ##STR1## in which R' is hydrogen or a methyl radical; R is a hydroxyl, acetoxy, arylaminocarbonyloxy, alkylaminocarbonyloxy radical;Z is hydrogen or a lower alkyl, orR and Z together are oxygen.These compounds exhibit a very favorable separation of desirable contraceptive and undesirable uterine and antigonadotrophic properties.
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: November 4, 1980
    Assignee: VEB Jenapharm
    Inventors: Kurt Ponsold, Richard Prousa, Michael Oettel, Joachim Strecke, Herbert Hoffmann