Patents by Inventor Jan V. Schaik

Jan V. Schaik 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).

  • Surfactant composition
    Patent number: 5061386
    Abstract: Surfactant composition comprising an alkyl amine ethoxylate and a gel breaker, wherein the gel breaker is a random copolymer of ethylene oxide with propylene oxide/or butylene oxide.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: October 29, 1991
    Assignee: Shell Oil Company
    Inventors: Herman M. Muijs, Jan V. Schaik