Patents by Inventor Hans Georg Wilhelm Leuenberger

Hans Georg Wilhelm Leuenberger 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).

  • Optically active cyclohexane derivatives
    Patent number: 4095038
    Abstract: A process for fermentatively hydrogenating and reducing ketoisophorone to produce optically active [4R,6R]-4-hydroxy-2,6,6-trimethyl-cyclohexanone useful as an intermediate in the production of optically active carotenoids and intermediates in the production of these carotenoids.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: June 13, 1978
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Boguth, Hans Georg Wilhelm Leuenberger, Hans Johann Mayer, Erich Widmer, Reinhard Zell
  • Optically active cyclohexane derivatives
    Patent number: 4026949
    Abstract: A process for fermentatively hydrogenating and reducing ketoisophorone to produce optically active [4R,6R]-4-hydroxy-2,6,6-trimethyl-cyclohexanone useful as an intermediate in the production of optically active carotenoids and intermediates in the production of these carotenoids.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: May 31, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Boguth, Hans Georg Wilhelm Leuenberger, Hans Johann Mayer, Erich Widmer, Reinhard Zell
  • Optically active cyclohexane derivatives
    Patent number: 3988205
    Abstract: A process for fermentatively hydrogenating and reducing ketoisophorone to produce optically active [4R,6R]-4-hydroxy-2,6,6-trimethyl-cyclohexanone useful as an intermediate in the production of optically active carotenoids and intermediates in the production of these carotenoids.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: October 26, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Boguth, Hans Georg Wilhelm Leuenberger, Hans Johann Mayer, Erich Widmer, Reinhard Zell