Patents by Inventor Stephen Huffer

Stephen Huffer 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 polyalkenyl succinimide products, novel polyalkenylsuccinimide products with improved properties, intermediate products
    Publication number: 20040180797
    Abstract: A process for the preparation of polyalkenylsuccinimide products, in particular polyisobutenylsuccinimide products, is proposed, in which a polyalkene is reacted with a maleic acid, maleic anhydride or a functional derivative thereof to give a polyalkenylsuccinic anhydride and the polyalkenylsuccinic anhydride is then reacted with an oligoamine or polyamine, the polyalkenylsuccinic anhydride either
    Type: Application
    Filed: November 14, 2003
    Publication date: September 16, 2004
    Inventors: Stephen Huffer, Peter Schwab, Klaus Fischer, Thomas Berg, Helmut Mach
  • Composition for producing surfaces which are difficult to wet
    Publication number: 20040014865
    Abstract: The invention relates to a composition comprising at least one hydrophylic, inorganic powder (P) having an average particle size of between 15 and 500 &mgr;m, and at least one hydrophobic, thermoplastic substance (T) which is characterised by a surface tension of between 20 and 50 mN/m. The weight ratio of the hydrophylic, inorganic powder to the hydrophobic, thermoplastic substance P:T is between 50:1 and 1:2.
    Type: Application
    Filed: April 14, 2003
    Publication date: January 22, 2004
    Inventors: Harald Keller, Ekkehard Jahns, Christian Lach, Stephen Huffer, Thilo Krebs, Yi Thomann, Thomas Frechen