Patents by Inventor Reike De Jong

Reike De Jong 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).

  • Dissolving barium sulfate scale with aqueous solutions of salts of carboxymethyl monocyclic macrocyclic polyamines
    Patent number: 4190462
    Abstract: Barium sulfate scale can be removed from remote locations such as those in or around the borehole of a well extending into a subterranean earth formation by contacting the scale with an aqueous solution consisting essentially of water,a monovalent cation salt of a monocyclic macrocyclic polyamine containing at least two nitrogen-linked carboxymethyl groups and enough monovalent basic compound to provide a solution pH of about 8.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: February 26, 1980
    Assignee: Shell Oil Company
    Inventors: Reike De Jong, Gerridina J. Torny-Schutte, David N. Reinhoudt