Patents by Inventor Johnson Tu

Johnson Tu 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).

  • Process to manufacture flexible polyurethane foams
    Patent number: 7361695
    Abstract: The present invention is to the production of flexible polyurethane foam in the absence of an amine catalyst. The reactivity of the foam forming system can be controlled by the addition of an autocatalytic polyol containing a tertiary amine where the amount of autocatalytic polyol comprises less than 5 percent by weight of the total polyol.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: April 22, 2008
    Assignee: Dow Global Technologies Inc.
    Inventors: Johnson Tu, Lance A. Cooper, Francois M. Casati, Jean-Marie L. Sooney
  • Process to manufacture flexible polyurethane foams
    Publication number: 20040242718
    Abstract: The present invention is to the production of flexible polyurethane foam in the absence of an amine catalyst. The reactivity of the foam forming system can be controlled by the addition of an autocatalytic polyol containing a tertiary amine where the amount of autocatalytic polyol comprises less than 5 percent by weight of the total polyol.
    Type: Application
    Filed: July 12, 2004
    Publication date: December 2, 2004
    Inventors: Johnson Tu, Lance A Cooper, Francois M Casati, Jean-Marie L Sooney