Patents by Inventor Radulf Oberthur

Radulf Oberthur 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).

  • Keratin-based products and methods for their productions
    Patent number: 7169896
    Abstract: The present invention relates to a process for solubilizing keratins from a keratin containing starting material such as poultry feathers. The keratins are may be solubilized using a sulphide under alkaline conditions. In the process the cysteine residues of solubilized keratins and are partially modified, e.g. by alkylation. The conditions of solubilisation and partial modification are chosen such that the keratins are also partially hydrolyzed. The partially modified and partially hydrolyzed keratin may be used as stable dispersions e.g. for the production of films and coatings by casting.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: January 30, 2007
    Assignee: Stichting Nederlands Instituut voor Zuivelonderzoek
    Inventors: Peter Marcel Myriam Schrooyen, Radulf Oberthur