Patents by Inventor Bethel Q. Green

Bethel Q. Green 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).

  • Drilling fluid additives
    Patent number: 4220585
    Abstract: A drilling fluid additive effective as a viscosity controlling agent is composed of complex titanium or zirconium lignosulfonates and/or salts of lignosulfonic acid. Alternatively, the additive may be a titanium-iron lignosulfonate and/or salt or lignosulfonic acid or a zirconium-iron lignosulfonate and/or salt of lignosulfonic acid. The additive is effective with the lignin component of the lignosulfonate being in either oxidized or unoxidized form.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: September 2, 1980
    Assignee: Dresser Industries, Inc.
    Inventors: Paul H. Javora, Bethel Q. Green