Patents by Inventor Geert-Jan Willems

Geert-Jan Willems 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).

  • High performance thermoplastic compositions with improved melt flow behavior
    Patent number: 6417255
    Abstract: The present invention is a high performance thermoplastic polymer composition that comprises a thermoplastic polymer resin such as polyetherimide, polyethersulfone, etc., and an additive formulated to improve the overall melt flow properties of the final composition. The additive can be a phosphonium sulfonate or an anhydride. The final composition has improved melt flow qualities with no significant depreciation in other desirable characteristics.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: July 9, 2002
    Assignee: General Electric Company
    Inventors: Jan Paul Penning, Robert Puyenbroek, Geert-Jan Willems
  • Method for making bis-xylenols containing acid moieties
    Patent number: 5969180
    Abstract: An improved method for the preparation of functionalized substituted bisphenol compound is provided. In particular, there is provided a method of making a functionalized substituted bisphenol compound of the formula: ##STR1## which comprises heating a mixture comprising a 2,6-dimethylphenol and levulinic acid in the presence of an effective amount of a macroreticular ion-exchange resin, optionally with removal of the water of reaction.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: October 19, 1999
    Assignee: General Electric Company
    Inventors: Geert-Jan Willems, Juraj Liska