Patents by Inventor Gerhard Cimbollek

Gerhard Cimbollek 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 the preparation of thioglycolic acid alkyl esters
    Patent number: 5714629
    Abstract: The invention relates to an improved process for the preparation of thioglycolic acid alkyl esters by heating a reaction mixture which essentially comprises thioglycolic acid, an alcohol and an acid catalyst, the water formed being removed by distillation using a water separator, in which the resulting product mixture is passed over a basic ion exchanger, if appropriate after removal of the acid catalyst.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: February 3, 1998
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Alexandra Schneider, Gerhard Cimbollek, Bernd Muller, Ulrich Heywang