Patents by Inventor George Wanyoike

George Wanyoike 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).

  • METHOD FOR PRODUCING CAMPTOTHECIN DERIVATIVES
    Publication number: 20110112298
    Abstract: The invention offers a method of hydrogenating camptothecin in inert solvent in the presence of nickel catalyst, whereby selective hydrogenation of camptothecin can be very efficiently accomplished using the low-cost catalyst.
    Type: Application
    Filed: May 22, 2009
    Publication date: May 12, 2011
    Applicants: MERCIAN CORPORATION, SICHUAN XIELI PHARMACEUTICAL CO., LTD.
    Inventors: Asako Toyoda, Hazuki Nagai, George Wanyoike