Patents by Inventor Coenraad M. Gehrels

Coenraad M. Gehrels 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).

  • Powder paint binder composition
    Publication number: 20020103329
    Abstract: The invention relates to a powder paint binder-composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker.
    Type: Application
    Filed: November 30, 2001
    Publication date: August 1, 2002
    Applicant: DSM N.V.
    Inventors: Fokeltje A. Koldijk, Eimbert G. Belder, Coenraad M. Gehrels, Tosko A. Misev
  • Powder paint binder composition
    Patent number: 6337137
    Abstract: The invention relates to a powder paint composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker. The polymer is obtained by preparing an unsaturated polymer in a first step, which then reacts with cyclopentadiene at a temperature between 160 ° C and 220 ° C in a second step. The polymer preferably contains more than 10 wt.% endomethylene tetrahydrophthalic acid units and is preferably an unsaturated polymer.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: January 8, 2002
    Assignee: DSM N.V.
    Inventors: Fokeltje A. Koldijk, Eimbert G. Belder, Coenraad M. Gehrels, Tosko A. Misev