Patents by Inventor Rainer Lowack

Rainer Lowack 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).

  • Preparation of alpha-tocopherol and alpha-tocopheryl acetate in liquid or supercritical carbon dioxide
    Patent number: 5523420
    Abstract: A process for preparing .alpha.-tocopherol or tocopheryl acetate by cyclocondensation of trimethylhydroquinone with phytol or isophytol in the presence of an acid catalyst and of a solvent and, where appropriate, subsequent acetylation, which comprises carrying out the cyclocondensation and, where appropriate, the subsequent acetylation in liquid or supercritical carbon dioxide as solvent.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: June 4, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Lowack, Joachim Meyer, Manfred Eggersdorfer, Paul Grafen