Patents by Inventor Karin Koller

Karin Koller 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).

  • Chemical method for lignin depolymerization
    Patent number: 6214976
    Abstract: A process for depolymerizing and/or chemically modifying lignin or lignin-like compounds in which a solution of copper and peroxide acts on lignin and/or lignin-like substance at a temperature of less than 100° C., characterized in that the solution is an aqueous solution containing copper or a copper complex, a coordination compound and peroxide and wherein the concentration of the copper or copper complex is between 0.001% and 5%, and wherein the concentration of the coordination compound is lower than 20% and wherein the concentration of peroxide is between 0.01% and 20%.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: April 10, 2001
    Inventors: Takashi Watanabe, Kurt Messner, Karin Koller