Patents by Inventor Peter K. Matzinger

Peter K. Matzinger 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).

  • Tocopherol cyclase isolated from Chlorella protothecoides, Dunaliella salina and wheat leaves
    Patent number: 5432069
    Abstract: A tocopherol cyclase is produced in homogenous form which acts on phytyl benzoquinol derivatives to produce R', R', R'-tocopherols enantioselectively. The cyclase has a molecular weight of from about 48 kD to about 50 kD as determined by SDS-PAGE. The cyclase is isolated from Chlorella protothecoides, Dunaliella salina and wheat leaves of the Fidel variety.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: July 11, 1995
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Fiona Gruninger, Erich Hochuli, Peter K. Matzinger
  • L-gulono-gamma-lactone-dehydrogenase for producing vitamin C
    Patent number: 5250428
    Abstract: The present invention concerns a novel process for the microbiological manufacture of L-ascorbic acid from L-gulono-gamma-lactone, a process for preparing the enzyme being responsible for the microbiological oxidation of L-gulono-gamma-lactone, and said enzyme as a homogeneous protein, which is a L-gulono-gamma-lactone dehydrogenase.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: October 5, 1993
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Tatsuo Hoshino, Peter K. Matzinger, Setsuko Ojima, Teruhide Sugisawa
  • Process to produce alpha-substituted derivatives of 3-hydroxypropionic acid
    Patent number: 4734367
    Abstract: The manufacture of optically active compounds of the formula ##STR1## wherein R.sup.1 signifies alkyl, phenyl or benzyl and R.sup.2 signifies hydrogen or a customary ester residue,by the fermentative reduction of compounds of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the above significance. The compounds obtained are valuable intermediates in organic syntheses.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: March 29, 1988
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Hans G. W. Leuenberger, Peter K. Matzinger, Dieter Seebach, Max F. Zuger