Patents by Inventor Pieter Gijsman

Pieter Gijsman 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).

  • Thermoplastic elastomer
    Patent number: 5907004
    Abstract: The invention relates to a thermoplastic elastomer comprising a blend of a rubber and a thermoplastic resins the rubber being at least partially cured with a phenolic curative. The invention is that, to overcome problems with surface cracking, the thermoplastic elastomer also comprises a hydrolysis-insensitive HALS-compound.The invention also relates to the preparation of such a thermoplastic elastomer.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: May 25, 1999
    Assignee: DSM N.V.
    Inventors: Albertus O. Dozeman, Pieter Gijsman
  • Thermostable ethylene-carbon monoxide copolymer containing Al-Mg-CO.sub.3 or CaO
    Patent number: 5286785
    Abstract: Ethylene-carbon monoxide copolymer composition with improved thermal stability wherein the insoluble copolymer content after exposure to a temperature of 265.degree. C. during 5 minutes is at most 40 wt. % and use of the composition for the manufacture of objects, essentially consisting of ethylene-carbon monoxide copolymer. The composition preferably contains an inorganic compound reacting as a base upon contact with water.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: February 15, 1994
    Assignee: DSM N.V.
    Inventors: Pieter Gijsman, Daniel J. M. Tummers
  • Stabilized polyamide 4.6 compositions
    Patent number: 5157064
    Abstract: The invention relates to a stabilized polyamide 4.6 composition, which includes copper in the form of a water insoluble copper salt and a halogen-substituted organic compound.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: October 20, 1992
    Assignee: Stamicarbon B.V.
    Inventor: Pieter Gijsman
  • Polyamide composition
    Patent number: 4876301
    Abstract: The invention relates to a polyamide composition with improved stability in contact with oil at elevated temperatures. The polyamide composition with superior stability characteristics has been obtained by the incorporation in the polyamide composition of a small amount of an alkaline inorganic material. Preferably the polyamide is nylon 4.6.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: October 24, 1989
    Assignee: Stamicarbon B.V.
    Inventors: Erik R. Peerlkamp, Pieter Gijsman