Patents by Inventor Andreas S. W. van Paassen

Andreas S. W. van Paassen 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).

  • Treating an underground formation
    Patent number: 5129458
    Abstract: A method of treating an underground formation is disclosed. The method comprises contacting the underground formation with a resin system comprising betwen 15 and 30% v of monomeric and/or polymeric organic polyepoxides having more than one epoxy group per molecule, between 5 and 20% v of a curing agent, between 75 and 25% v of a polyalkylene glycol alkyl ether and between 5 and 25% v polyalkylene glycol.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: July 14, 1992
    Assignee: Shell Oil Company
    Inventors: Anthony P. King, Andreas S. W. van Paassen