Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10000976 | Cutting element | Haydn G. Smith | 2018-06-19 |
| 10000975 | Cutting element | Alan Honggen Jiang, Mark Jonathan Francis, Haydn G. Smith | 2018-06-19 |
| 9156136 | Systems and methods for vapor pressure leaching polycrystalline diamond cutter elements | Guodong Zhan, Walter R. Rothrock, Parul Walia Dhall, Michael Scott Nixon | 2015-10-13 |
| 6601662 | Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength | Nigel Dennis Griffin, Peter Raymond Hughes | 2003-08-05 |
| 6575350 | Method of applying a wear-resistant layer to a surface of a downhole component | Stephen M. Evans, Tom Scott Roberts | 2003-06-10 |
| 6481511 | Rotary drill bit | Nigel Dennis Griffin, Peter Raymond Hughes | 2002-11-19 |
| 6439327 | Cutting elements for rotary drill bits | Nigel Dennis Griffin | 2002-08-27 |
| 6435058 | Rotary drill bit design method | Nigel Dennis Griffin, Peter Raymond Hughes | 2002-08-20 |
| 6234261 | Method of applying a wear-resistant layer to a surface of a downhole component | Stephen M. Evans, Tom Scott Roberts | 2001-05-22 |
| 6145607 | Preform cutting elements for rotary drag-type drill bits | Nigel Dennis Griffin | 2000-11-14 |
| 6098729 | Preform cutting elements for rotary drill bits | — | 2000-08-08 |
| 6082474 | Elements faced with superhard material | — | 2000-07-04 |
| 6011232 | Manufacture of elements faced with superhard material | — | 2000-01-04 |
| 5862873 | Elements faced with superhard material | Alex Newton, Daniel J. Sarik | 1999-01-26 |
| 5819862 | Downhole components for use in subsurface drilling | John Hayward, Haydn R. Lamb | 1998-10-13 |
| 5788001 | Elements faced with superhard material | Alex Newton | 1998-08-04 |
| 5769175 | Cutter assemblies for rotary drill bits | — | 1998-06-23 |
| 5740874 | Cutting elements for rotary drill bits | — | 1998-04-21 |
| 5617928 | Elements faced with superhard material | John M. Fuller, Nigel Dennis Griffin | 1997-04-08 |
| 5611649 | Elements faced with superhard material | — | 1997-03-18 |
| 5590728 | Elements faced with superhard material | Nigel Dennis Griffin, John M. Fuller | 1997-01-07 |
| 4862977 | Drill bit and cutter therefor | John D. Barr, Malcolm R. Taylor | 1989-09-05 |
| 4727946 | Rotary drill bits | John D. Barr | 1988-03-01 |
| 4669556 | Drill bit and cutter therefor | John D. Barr, Malcolm R. Taylor | 1987-06-02 |
| 4596296 | Rotary drill bits | — | 1986-06-24 |