The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2006
Filed:
May. 14, 2003
Applicants:
Madapusi K. Keshavan, The Woodlands, TX (US);
Anthony Griffo, The Woodlands, TX (US);
David Truax, Houston, TX (US);
Dah-ben Liang, The Woodlands, TX (US);
Inventors:
Madapusi K. Keshavan, The Woodlands, TX (US);
Anthony Griffo, The Woodlands, TX (US);
David Truax, Houston, TX (US);
Dah-Ben Liang, The Woodlands, TX (US);
Assignee:
Smith International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 10/08 (2006.01); E21B 10/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
Cutting elements having coarse grain substrates and ultra hard material layers are provided. The substrates are formed from coarse grain size particles of tungsten carbide. A method of forming such cutting elements and a drag bit incorporating such cutting elements are also provided.