Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8956438 | Low coefficient of thermal expansion cermet compositions | Zhigang Fang, Anthony Griffo, Gregory T. Lockwood | 2015-02-17 |
| 8561731 | Hardmetal for use in oil and gas drilling applications | Madapusi K. Keshavan | 2013-10-22 |
| 8323372 | Low coefficient of thermal expansion cermet compositions | Zhigang Fang, Anthony Griffo, Gregory T. Lockwood | 2012-12-04 |
| 8016056 | Asymmetric graded composites for improved drill bits | Ramamurthy Viswanadham, Gregory T. Lockwood | 2011-09-13 |
| 7832506 | Cutting elements with increased toughness and thermal fatigue resistance for drilling applications | Gary R. Portwood, James C. Minikus, Amardeep Singh, Jonathan Bitler | 2010-11-16 |
| 7666244 | Hardfacing milled-tooth drill bits using super dense carbide pellets | Gregory T. Lockwood, Anthony Griffo, Alysia C. White | 2010-02-23 |
| 7549912 | Method of finishing cutting elements | Ramamurthy Viswanadham | 2009-06-23 |
| 7475743 | High-strength, high-toughness matrix bit bodies | Anthony Griffo, Thomas W. Oldham, Gregory T. Lockwood | 2009-01-13 |
| 7407525 | Fracture and wear resistant compounds and down hole cutting tools | — | 2008-08-05 |
| 7258177 | Fracture and wear resistant compounds and rock bits | Anthony Griffo | 2007-08-21 |
| 7128773 | Compositions having enhanced wear resistance | Greg Lockwood, Anthony Griffo | 2006-10-31 |
| 7036614 | Fracture and wear resistant compounds and rock bits | Anthony Griffo | 2006-05-02 |
| 7017677 | Coarse carbide substrate cutting elements and method of forming the same | Madapusi K. Keshavan, Anthony Griffo, David Truax | 2006-03-28 |
| 6782958 | Hardfacing for milled tooth drill bits | Alysia C. White, Greg Lockwood, Anthony Griffo | 2004-08-31 |
| 6659206 | Hardfacing composition for rock bits | Alysia C. White | 2003-12-09 |
| 6655478 | Fracture and wear resistant rock bits | Gary R. Portwood, Paul E. Cox, John L. Williams | 2003-12-02 |
| 6197084 | Thermal fatigue and shock-resistant material for earth-boring bits | — | 2001-03-06 |
| 5944127 | Hardfacing material for rock bits | Alysia C. White, Zhigang Fang, Jiinjen Albert Sue | 1999-08-31 |
| 5791422 | Rock bit with hardfacing material incorporating spherical cast carbide particles | Alysia C. White, Zhigang Fang, Jiinjen Albert Sue | 1998-08-11 |
| 5715899 | Hard facing material for rock bits | Alysia C. White, Madapusi K. Keshavan | 1998-02-10 |
| 5472058 | Rock bit with mechanical seal | Michael Hooper, Madapusi K. Keshavan | 1995-12-05 |
| 5370195 | Drill bit inserts enhanced with polycrystalline diamond | Madapusi K. Keshavan, Monte Russell | 1994-12-06 |
| 5305840 | Rock bit with cobalt alloy cemented tungsten carbide inserts | Madapusi K. Keshavan | 1994-04-26 |
| 4549615 | Single-pass notching and drilling tool and method of drilling a blast role therewith | Robert S. Gulibon | 1985-10-29 |