Issued Patents All Time
Showing 26–50 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7703556 | Methods of attaching a shank to a body of an earth-boring tool including a load-bearing joint and tools formed by such methods | James L. Duggan, Anupam Singh | 2010-04-27 |
| 7681668 | Shrink-fit sleeve assembly for a drill bit, including nozzle assembly and method therefor | James Andy Oxford, John H. Stevens, James L. Duggan | 2010-03-23 |
| 7168147 | Method for manufacturing a drilling tool with an elastomer seal having graded properties | Terry J. Koltermann, Jiri George Drobny | 2007-01-30 |
| 7048081 | Superabrasive cutting element having an asperital cutting face and drill bit so equipped | Marcus Skeem, Craig H. Cooley | 2006-05-23 |
| 6872356 | Method of forming polycrystalline diamond cutters having modified residual stresses | Trent N. Butcher, Ralph M. Horton, Stephen R. Jurewicz, Danny E. Scott | 2005-03-29 |
| 6739417 | Superabrasive cutters and drill bits so equipped | Danny E. Scott, Craig H. Cooley, Marcus Skeem | 2004-05-25 |
| 6581671 | System for infiltrating preformed components and component assemblies | Trent N. Butcher, Sidney L. Findley | 2003-06-24 |
| 6571891 | Web cutter | Danny E. Scott, Craig H. Cooley, Marcus Skeem | 2003-06-03 |
| 6521174 | Method of forming polycrystalline diamond cutters having modified residual stresses | Trent N. Butcher, Ralph M. Horton, Stephen R. Jurewicz, Danny E. Scott | 2003-02-18 |
| 6354362 | Method and apparatus for infiltrating preformed components and component assemblies | Sidney L. Findley, Trent N. Butcher | 2002-03-12 |
| 6220375 | Polycrystalline diamond cutters having modified residual stresses | Trent N. Butcher, Ralph M. Horton, Stephen R. Jurewicz, Danny E. Scott | 2001-04-24 |
| 6209420 | Method of manufacturing bits, bit components and other articles of manufacture | Trent N. Butcher, Sidney L. Findley | 2001-04-03 |
| 6202771 | Cutting element with controlled superabrasive contact area, drill bits so equipped | Danny E. Scott, Ralph M. Horton, Arthur A. Chaves | 2001-03-20 |
| 6145608 | Superhard cutting structure having reduced surface roughness and bit for subterranean drilling so equipped | Jeffrey B. Lund, Trent N. Butcher | 2000-11-14 |
| 6098731 | Drill bit compact with boron or beryllium for fracture resistance | Jacob Chow, Ralph M. Horton, Gordon A. Tibbitts | 2000-08-08 |
| 5967250 | Modified superhard cutting element having reduced surface roughness and method of modifying | Jeffrey B. Lund, Trent N. Butcher | 1999-10-19 |
| 5957006 | Fabrication method for rotary bits and bit components | — | 1999-09-28 |
| 5839329 | Method for infiltrating preformed components and component assemblies | Sidney L. Findley, Trent N. Butcher | 1998-11-24 |
| 5820985 | PDC cutters with improved toughness | Jacob Chow, Ralph M. Horton, Gordon A. Tibbitts | 1998-10-13 |
| 5653300 | Modified superhard cutting elements having reduced surface roughness method of modifying, drill bits equipped with such cutting elements, and methods of drilling therewith | Jeffrey B. Lund | 1997-08-05 |
| 5544550 | Fabrication method for rotary bits and bit components | — | 1996-08-13 |
| 5492188 | Stress-reduced superhard cutting element | Arthur A. Chaves | 1996-02-20 |
| 5447208 | Superhard cutting element having reduced surface roughness and method of modifying | Jeffrey B. Lund | 1995-09-05 |
| 5437343 | Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor | Craig H. Cooley, Jeffrey B. Lund | 1995-08-01 |
| 5433280 | Fabrication method for rotary bits and bit components and bits and components produced thereby | — | 1995-07-18 |