Issued Patents All Time
Showing 76–100 of 111 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6892836 | Cutting element having a substrate, a transition layer and an ultra hard material layer | Ronald K. Eyre | 2005-05-17 |
| 6484826 | Engineered enhanced inserts for rock drilling bits | Nathan R. Anderson, J. Daniel Belnap, Chris E. Cawthorne, Ronald K. Eyre, Per Ivar Nese +2 more | 2002-11-26 |
| 6460636 | Drill bit inserts with variations in thickness of diamond coating | Zhou Yong, Suprant J. Huang, Nathan R. Anderson, J. Daniel Belnap, Chris E. Cawthorne +4 more | 2002-10-08 |
| 6460637 | Engineered enhanced inserts for rock drilling bits | Michael A. Siracki, Chris E. Cawthorne, Per Ivar Nese, J. Daniel Belnap, Ronald K. Eyre +1 more | 2002-10-08 |
| 6419034 | Engineered enhanced inserts for rock drilling bits | J. Daniel Belnap, Ronald K. Eyre, Michael A. Siracki, Per Ivar Nese, Nathan R. Anderson | 2002-07-16 |
| 6405814 | Cutting element with canted design for improved braze contact area | Ronald K. Eyre, David Truax | 2002-06-18 |
| 6202772 | Cutting element with canted design for improved braze contact area | Ronald K. Eyre, David Truax | 2001-03-20 |
| 6199645 | Engineered enhanced inserts for rock drilling bits | Nathan R. Anderson, J. Daniel Belnap, Chris E. Cawthorne, Ronald K. Eyre, Per Ivar Nese +2 more | 2001-03-13 |
| 6193001 | Method for forming a non-uniform interface adjacent ultra hard material | Ronald K. Eyre | 2001-02-27 |
| 5967245 | Rolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting duty | Gary E. Garcia, Gary R. Portwood, James C. Minikus, Per Ivar Nese, Dennis Cisneros +1 more | 1999-10-19 |
| 5868885 | Manufacture of cutting tools | Ronald B. Crockett, Scott M. Packer, Richard L. Dixon, Nathan R. Anderson, Ronald K. Eyre +1 more | 1999-02-09 |
| 5833021 | Surface enhanced polycrystalline diamond composite cutters | Graham Mensa-Wilmot, Ghanshyam Rai, David Truax, Kuttaripalayam T. Kembaiyan | 1998-11-10 |
| 5830813 | Method of making a polycrystalline cubic boron nitride cutting tool | Xian Yao, Matthew W. Collier, Ghanshyam Rai | 1998-11-03 |
| 5780139 | Multi-layer anvil for ultra high pressure presses | Lan Carter, Ghanshyam Rai, Jimmy W. Eason, Vonnie D. Hood | 1998-07-14 |
| 5766394 | Method for forming a polycrystalline layer of ultra hard material | Nathan R. Anderson, Ronald K. Eyre, Ghanshyam Rai | 1998-06-16 |
| 5715899 | Hard facing material for rock bits | Dah-Ben Liang, Alysia C. White | 1998-02-10 |
| 5639285 | Polycrystallline cubic boron nitride cutting tool | Xian Yao, Matthew W. Collier, Ghanshyam Rai | 1997-06-17 |
| 5593474 | Composite cemented carbide | Proserfina C. Rey | 1997-01-14 |
| 5535838 | High performance overlay for rock drilling bits | Kuttaripalayam T. Kembaiyan, Wayne Quantz, Robert C. Tucker, Jr., Melvin D. Mendenhall, Jean M. Quets | 1996-07-16 |
| 5494122 | Composite nozzles for rock bits | James L. Larsen, Michael A. Siracki, Thomas W. Oldham | 1996-02-27 |
| 5485890 | Rock bit | Chris E. Cawthorne, Steve Peterson, Naresh J. Kar | 1996-01-23 |
| 5472058 | Rock bit with mechanical seal | Michael Hooper, Dah-Ben Liang | 1995-12-05 |
| 5456327 | O-ring seal for rock bit bearings | Robert Denton, Steven W. Peterson | 1995-10-10 |
| 5402858 | O-ring seal for rock bit bearings | Wayne Quantz, Michael Hooper, Mark J. Hommel | 1995-04-04 |
| 5395221 | Carbide or boride coated rotor for a positive displacement motor or pump | Robert C. Tucker, Jr., Melvin D. Mendenhall | 1995-03-07 |