Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6753299 | Composite silica proppant material | Larry A. Wolfe | 2004-06-22 |
| 5120455 | Hydraulic fracturing propping agent | — | 1992-06-09 |
| 4522731 | Hydraulic fracturing propping agent | — | 1985-06-11 |
| 4440866 | Process for the production of sintered bauxite spheres | Sten Mortensen, Aubrey P. Ward | 1984-04-03 |