Patents by Inventor Hans-Joachim Palme

Hans-Joachim Palme 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).

  • Steroid intermediate products and method of their production
    Patent number: 5831104
    Abstract: The invention is directed to novel steroid intermediate products of general formula I ##STR1## The steroid intermediate products which can be isolated according to the invention are suitable for the synthesis of 13-ethyl-11-methylene-18,19-bisnor-17.alpha.-pregn-4-en-20-in-17-ol (desogestrel).Further, processes for producing the steroid intermediate products of general formula I are described. The olefination of the 11-oxo steroids is carried out under the influence of ultrasound.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: November 3, 1998
    Assignee: Jenapharm GmbH
    Inventors: Sven Ring, Gerhard Teichmueller, Gisela Weber, Sigfrid Schwarz, Bernd Erhart, Bernd Undeutsch, Harald Raethe, Peter Moellmann, Carmen Pfeiffer, Hans-Joachim Palme