Patents by Inventor Paula S. Steiert

Paula S. Steiert 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).

  • 1,2-dehydrogenation of steroidal 21-esters with Arthrobacter simplex or Bacterium cyclooxydans
    Patent number: 5225335
    Abstract: The present invention involves processes for 1,2-dehydrogenation of .DELTA..sup.4 -3-keto C.sub.21 -hemiester steroids of formula (I) ##STR1## with Arthrobacter simplex or Bacterium cyclooxydans to produce the corresponding .DELTA..sup.1,4 -3-keto C.sub.21 hemiester of formula (II) ##STR2## or free alcohol thereof with improved yields. The advantage is that the processes utilize higher substrate concentrations and give shorter reaction times than previously were known.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: July 6, 1993
    Assignee: The Upjohn Company
    Inventors: Leo A. Kominek, Holly J. Wolf, Paula S. Steiert