Patents by Inventor Elbert R. Gill

Elbert R. Gill 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 sub
    Patent number: 4479558
    Abstract: An improved construction is provided for a transverse passageway and a nozzle of a drilling sub of the type used to eject drilling fluid from the transverse passageway to create a vortex in an annulus surrounding the drilling sub.
    Type: Grant
    Filed: August 5, 1981
    Date of Patent: October 30, 1984
    Assignee: Gill Industries, Inc.
    Inventors: Elbert R. Gill, Ladd M. Adams