Patents by Inventor Henricus Paulus Maria Tomassen

Henricus Paulus Maria Tomassen 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).

  • Polymeric flow improver additives
    Patent number: 5721201
    Abstract: The present invention provides a copolymer of at least one n-(C.sub.8 -C.sub.30 -alkyl) (meth)acrylate with maleic anhydride, which contains alternating (meth)acrylate and maleic anhydride monomeric units, characterized in that the copolymer has a degree of alternation of at least 85%, a process for preparing the copolymer, a hydrocarbon oil composition containing the copolymer and the use of the copolymer as a flow improver additive.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: February 24, 1998
    Assignee: Shell Oil Company
    Inventors: Henricus Paulus Maria Tomassen, Christinus Cornelis van de Kamp, Marinus Johannes Reynhout, Jian Lin