Patents by Inventor Andrew David Stone

Andrew David Stone 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).

  • DRILL BIT
    Publication number: 20140262543
    Abstract: The present invention relates generally to drill bits used in drilling subterranean boreholes. More specifically, the invention relates to drill bits and cutting elements on the drill bits and the design of each. The invention utilizes a cutting element having a convex curved top portion with a shear face wherein said shear face is a plane formed by taking a planer slice from said convex curved top portion.
    Type: Application
    Filed: January 27, 2014
    Publication date: September 18, 2014
    Applicant: CHESAPEAKE OPERATING, INC.
    Inventors: Andrew David Stone, Gansam Rai