Patents by Inventor Stefan Burckhardt

Stefan Burckhardt 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 HPB esters
    Patent number: 6417389
    Abstract: This invention relates to a novel advantageous process for the stereoselective preparation of 2-hydroxy-4-phenylbutyrates (HPB esters) and of their precursors. This is done by starting from readily accessible &agr;-unsaturated &agr;-hydroxy-&ggr;-keto esters which can be prepared by Claisen condensation.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: July 9, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Martin Studer, Peter Herold, Adriano Indolese, Stefan Burckhardt