Patents by Inventor Wenkai Zhang

Wenkai Zhang 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).

  • Polyurethane foams containing silicone surfactants
    Patent number: 8044109
    Abstract: The present invention relates to polyurethane foam prepared from a polyurethane foam-forming reaction mixture possessing a silicone copolymer surfactant, methods for making the surfactant, and a process for preparing low density polyurethane foams.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: October 25, 2011
    Assignee: Momentive Performance Materials Inc.
    Inventors: Zhihong Gu, Lijun Feng, Wenkai Zhang, Paul Austin
  • Polyurethane foams containing silicone surfactants
    Publication number: 20090253817
    Abstract: The present invention relates to polyurethane foam prepared from a polyurethane foam-forming reaction mixture possessing a silicone copolymer surfactant, methods for making the surfactant, and a process for preparing low density polyurethane foams.
    Type: Application
    Filed: April 3, 2008
    Publication date: October 8, 2009
    Inventors: Zhihong Gu, Lijun Feng, Wenkai Zhang, Paul Austin