Patents by Inventor Ulfried Feifer

Ulfried Feifer 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).

  • Synthesis of 2,4-pyrimidinediamines
    Patent number: 8691798
    Abstract: Disclosed herein are methods for synthesizing 2,4-pyrimidinediamines as well as intermediates used therein.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: April 8, 2014
    Assignee: Rigel Pharmaceuticals, Inc.
    Inventors: Ulfried Feifer, Karl-Heinz Giselbrecht, Michael Wolberg