Issued Patents 2011
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8066087 | Thermally stable ultra-hard material compact constructions | Anthony Griffo, Madapusi K. Keshavan, Youhe Zhang, Michael Janssen | 2011-11-29 |
| 8037951 | Cutter having shaped working surface with varying edge chamfer | Youhe Zhang, Steffen S. Kristiansen | 2011-10-18 |
| 8028771 | Polycrystalline diamond constructions having improved thermal stability | Madapusi K. Keshavan, Anthony Griffo, Youhe Zhang | 2011-10-04 |
| 7946363 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Madapusi K. Keshavan, Michael G. Azar | 2011-05-24 |
| 7926596 | Drag bit with utility blades | Youhe Zhang | 2011-04-19 |
| 7878275 | Matrix bit bodies with multiple matrix materials | Gregory T. Lockwood, Youhe Zhang | 2011-02-01 |
| 7861808 | Cutter for maintaining edge sharpness | Youhe Zhang | 2011-01-04 |
| 7862634 | Polycrystalline composites reinforced with elongated nanostructures | J. Daniel Belnap, Guodong Zhan, Xiayang Sheng, Youhe Zhang, Madapusi K. Keshavan +1 more | 2011-01-04 |