Patents by Inventor Andreas Kleefeldt

Andreas Kleefeldt 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 producing carnosol from carnosic acid using hydrogen peroxide or peracids
    Patent number: 8299275
    Abstract: Catalytic processes for the production of carnosol from carnosic acid using hydrogen peroxide or a peracid are presented. The carnosic acid may be in pure form, in an impure form, part of a plant extract, or may be present in rosemary needles. The catalyst may be iron, iron salts, a minor amount of water, rosemary needles, or a mixture thereof.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: October 30, 2012
    Assignee: DSM IP Assets B.V.
    Inventors: Andreas Kleefeldt, Christof Wehrli
  • PROCESS FOR PRODUCING CARNOSOL FROM CARNOSIC ACID USING HYDROGEN PEROXIDE OR PERACIDS
    Publication number: 20110144357
    Abstract: Catalytic processes for the production of carnosol from carnosic acid using hydrogen peroxide or a peracid are presented. The carnosic acid may be in pure form, in an impure form, part of a plant extract, or may be present in rosemary needles. The catalyst may be iron, iron salts, a minor amount of water, rosemary needles, or a mixture thereof.
    Type: Application
    Filed: August 4, 2009
    Publication date: June 16, 2011
    Inventors: Andreas Kleefeldt, Christof Wehrli