Patents by Inventor Allen E. Cates

Allen E. Cates 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).

  • Additive for drilling fluids
    Patent number: 4404108
    Abstract: A water-based gas or oil well drilling fluid comprising an aqueous clay dispersion containing as a thinner and water loss control agent, the essentially water-soluble product obtained by heating together quebracho, lignite, gilsonite and sulfonating, methylating and causticizing agents.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: September 13, 1983
    Inventor: Allen E. Cates