Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11643287 | Systems and methods for conveying a non-dry frac proppant | William J. Walker, Jr., Robert David Harper | 2023-05-09 |
| 9375761 | Methods for modifying non-standard frac sand to sand with fracking properties | Richard Dawson | 2016-06-28 |
| 7243478 | Vacuum system manifold and related methods | Charles G. Walker | 2007-07-17 |
| 7045068 | Apparatus and methods for separating slurried material | Robert J. Hutchinson | 2006-05-16 |
| 6911145 | Apparatus and methods for separating slurried material | Robert J. Hutchinson | 2005-06-28 |
| 6860042 | Excavation system employing a jet pump | Robert J. Hutchinson | 2005-03-01 |
| 6817837 | Jet pump with recirculating motive fluid | Robert J. Hutchinson | 2004-11-16 |
| 6450775 | Jet pumps and methods employing the same | Robert J. Hutchinson | 2002-09-17 |
| 6322327 | Jet pump for transfer of material | Robert J. Hutchinson | 2001-11-27 |