Patents by Inventor Hans-Gunter Lehmann

Hans-Gunter Lehmann 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).

  • 15.alpha.,-Sulfonyloxy-12.beta.-hydroxypregnanes and process for the preparation thereof
    Patent number: 3939187
    Abstract: 15.alpha.-Sulfonyl-12.beta.-hydroxypregnanes of the formula ##SPC1##Wherein Ac is lower-acyl and R is alkyl, cycloalkyl, aralkyl or aryl, which are useful as intermediates for the production of digoxigenin, are produced by the selective sulfonic acid esterification of the corresponding 12.beta., 15.alpha.-dihydroxy steroid.
    Type: Grant
    Filed: July 2, 1974
    Date of Patent: February 17, 1976
    Assignee: Schering Aktiengesellschaft
    Inventor: Hans-Gunter Lehmann
  • 17.alpha.-Ethinyl-18-methyl-19-nortestosterone esters
    Patent number: RE28690
    Abstract: A therapeutic compound for inhibiting ovulation comprising a 17-ester of 17.alpha.-ethinyl-18-methyl-19-nortestosterone wherein the said 17-ester group is formed from an aliphatic carboxylic acid having from six to 11 carbon atoms in the ester residue..Iaddend.
    Type: Grant
    Filed: July 19, 1974
    Date of Patent: January 20, 1976
    Assignee: Schering Aktiengesellschaft
    Inventors: Hans-Gunter Lehmann, Heinz Gibian, Rudolf Wiechert, Friedmund Neumann