Patents by Inventor John Dewhurst

John Dewhurst 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).

  • Trimer catalysts with improved processability and surface cure
    Publication number: 20070259982
    Abstract: The present invention provides trimerization catalyst compositions having an ?,?-unsaturated carboxylate salt and methods to produce a polyisocyanurate/polyurethane foam using such trimerization catalyst compositions.
    Type: Application
    Filed: May 4, 2006
    Publication date: November 8, 2007
    Inventors: Juan Burdeniuc, Torsten Panitzsch, John Dewhurst
  • Trimerization catalysts from sterically hindered salts
    Publication number: 20070259983
    Abstract: The present invention provides trimerization catalyst compositions having a sterically hindered carboxylate salt and methods to produce a polyisocyanurate/-polyurethane foam using such trimerization catalyst compositions.
    Type: Application
    Filed: May 4, 2006
    Publication date: November 8, 2007
    Inventors: Juan Burdeniuc, Torsten Panitzsch, John Dewhurst
  • Trimer catalyst additives for improving foam processability
    Publication number: 20070259773
    Abstract: The present invention provides trimerization catalyst compositions and methods to produce a polyisocyanurate/polyurethane foam using such trimerization catalyst compositions. The catalyst composition is the contact product of at least one ?,?-unsaturated carboxylate salt and at least one second carboxylate salt.
    Type: Application
    Filed: May 4, 2006
    Publication date: November 8, 2007
    Inventors: Juan Burdeniuc, Torsten Panitzsch, John Dewhurst, Gamini Vedage