Patents by Inventor Thomas A. Narwid

Thomas A. Narwid 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 chenodeoxycholic acid production
    Patent number: 4301246
    Abstract: A multi-step synthesis of chenodeoxycholic acid from 3-keto-bisnorcholenol, a compound readily obtained from the abundant plant sterol .beta.-sitosterol, is described. A key step in the synthesis is the stereoselective microbial introduction of the 7-alpha hydroxy group into 3-keto-bisnorcholenol.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: November 17, 1981
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Carl Despreaux, Thomas A. Narwid, Norberto J. Palleroni, Milan R. Uskokovic
  • Process for chenodeoxycholic acid and intermediates therefore
    Patent number: 4230625
    Abstract: A multi-step synthesis of chenodeoxycholic acid from 3-keto-bisnorcholenol, a compound readily obtained from the abundant plant sterol .beta.-sitosterol, is described. A key step in the synthesis is the stereoselective microbial introduction of the 7-alpha hydroxy group into 3-keto-bisnorcholenol.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: October 28, 1980
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Carl Despreaux, Thomas A. Narwid, Norberto J. Palleroni, Milan R. Uskokovic