Patents by Inventor Hans J. Mayer

Hans J. Mayer 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).

  • Retinoid carbohydrates
    Patent number: 4565863
    Abstract: The novel retinoids of the formula ##STR1## wherein R represents a residue of a sugar attached ester-wise or a residue of an amino-sugar attached amide-wise or of derivatives of such sugars and n is 1 or 2,can be used as medicaments, e.g. for the treatment of neoplasms, acne and psoriasis. These compounds are obtained by reacting a sugar or an aminosugar or a derivative thereof with a reactive derivative of 9-(4-methoxy-2,3,6-trimethylphenyl)-3,7-dimethyl-2,4,6,8-nonatetraenoic acid, optionally followed by the modification of reactive groups present in the reaction product.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: January 21, 1986
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Werner Bollag, Hans J. Mayer, Pierre-Charles Wyss
  • Process for producing astaxanthin
    Patent number: 4245109
    Abstract: The compound 5[4(acyloxy or protected hydroxy-3-oxo-2,6,6-trimethyl-cyclohex-1-en-1-yl)-3-methyl-penta-1,4-dien- 3-ol], an intermediate for the coloring agent astaxanthin, its conversion to astaxanthin and its preparation from 4-oxo-.beta.-ionone including intermediates in this synthesis.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: January 13, 1981
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Hans J. Mayer, Robert K. Muller
  • Optically active cyclohexane derivatives
    Patent number: 4156100
    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: November 7, 1977
    Date of Patent: May 22, 1979
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Boguth, Hans G. W. Leuenberger, Hans J. Mayer, Erich Widmer, Reinhard Zell
  • Optically active cyclohexane derivatives
    Patent number: 4072715
    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: February 7, 1978
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Walter Boguth, Hans G. W. Leuenberger, Hans J. Mayer, Erich Widmer, Reinhard Zell