Patents by Inventor Bernhard Krieger

Bernhard Krieger 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).

  • Process for production of 6.alpha.,9.alpha.-difluoro-11.beta.,17.alpha.-dihydroxy-16.alpha.-methyl -4-pregnene-3,20-dione and its derivatives
    Patent number: 4898693
    Abstract: 6.alpha.,9.alpha.-difluoro-11.beta.,17.alpha.-dihydroxy-16.alpha.-methyl-4- pregnene-3,20-dione and its derivatives of general formula I ##STR1## wherein symbolizes a single bond or a double bond, andX is H, Br, I or alkanoyloxy with 1-8 carbon atoms, are prepared by a novel process from 3.beta.,17.alpha.-dihydroxy-16.alpha.-methyl-5-pregnen-20-one. The resultant pregnene derivatives are useful as intermediates in the production of flumethasone.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: February 6, 1990
    Assignee: Schering Aktiengesellschaft
    Inventors: Gerhard Hempel, Mario Kennecke, Bernhard Krieger, Rainer Phillippson, Hermann Triem, Alfred Weber
  • 4-Androsten-3-ones and process for the preparation thereof
    Patent number: 4118488
    Abstract: 4-Androsten-3-ones of the formula ##STR1## wherein R.sub.1 is hydrogen or the acyl radical of an organic or inorganic acid, R.sub.2 is hydrogen, alkyl, or the acyl radical of an organic or inorganic acid, R.sub.3 is methyl or ethyl, R.sub.4 is hydrogen or methyl, ##STR2## and R.sub.5 is lower alkyl, have diuretic activity.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: October 3, 1978
    Assignee: Schering Aktiengesellschaft
    Inventors: Rainer Philippson, Bernhard Krieger, Jorge Casals-Stenzel, Ulrich Kerb, Wolfgang Losert, Klaus Prezewowsky, Rudolf Wiechert, Dieter Bittler