Patents by Inventor Paul C. Yates, Jr.

Paul C. Yates, Jr. 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).

  • Colloidal silica-based fluid diversion
    Patent number: 4732213
    Abstract: A process for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks which comprises injecting into the permeable zone or the site of the subterranean leak an aqueous solution containing 1 to 70 weight percent of a non-aggregated colloidal silica sol having a particle size in the range between 4 and 100 nm and a pH in the range between about 1 and 10, and causing said solution to gel in said zone or at said site.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: March 22, 1988
    Assignees: Conoco Inc., E. I. Du Pont de Nemours and Company
    Inventors: Karl E. Bennett, John L. Fitzjohn, Richard A. Harmon, Paul C. Yates, Jr.