Patents by Inventor Gerrit Kieft

Gerrit Kieft 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).

  • Use of a binder composition for the preparation of a powder coating for use as a top coat in the automotive industry and top-coated automotive substrates
    Patent number: 5580660
    Abstract: The invention relates to a binder composition for powder coatings for use as a topcoat in the automotive industry. The invention also relates to top-coated automotive substrates. The binder composition includes a polyester containing hydroxyl groups and a polyacrylate containing hydroxyl groups and a blocked hexamethylenediisocyanate trimer. The polyester has a hydroxyl number of between 20 and 100 mg KOH/g resin and an acid number of less than 10 mg KOH/g resin and the polyacrylate has a hydroxyl number of between 40 and 150 mg KOH/g resin and an acid number of less than 20 mg KOH/g resin. The trimer is blocked with 1,2,4-triazole.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: December 3, 1996
    Assignee: DSM N.V.
    Inventors: Franciscus M. Witte, Gerrit Kieft, Wilhelmus H. H. A. Van Den Elshout