Patents by Inventor Donald M. Kehn

Donald M. Kehn 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).

  • Method of acidizing subterranean formations
    Patent number: 3934651
    Abstract: A subterranean formation is treated by injecting into the formation an aqueous acid solution comprising a water soluble vinyl compound (preferably polyvinyl alcohol or polyvinylpyrrolidone), a natural gum (preferably guar gum or gum karaya) and finely divided particulate material (preferably silica sand).
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: January 27, 1976
    Assignee: Exxon Production Research Company
    Inventors: Dale E. Nierode, Donald M. Kehn, Keith F. Kruk