Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11027457 | Method and apparatus for improving mixing of cement slurry | Paul Alan Brown, Craig Allen Sneed | 2021-06-08 |
| 8162079 | Impact excavation system and method with injection system | Nathan J. Harder, Harry B. Curlett, Butch Hazel | 2012-04-24 |
| 7793741 | Impact excavation system and method with injection system | Nathan J. Harder, Harry B. Curlett, Butch Hazel | 2010-09-14 |
| 7757786 | Impact excavation system and method with injection system | Nathan J. Harder, Harry B. Curlett, Butch Hazel | 2010-07-20 |
| 7398838 | Impact excavation system and method with two-stage inductor | Nathan J. Harder, Harry B. Curlett, Samuel Curlett | 2008-07-15 |
| 7398839 | Impact excavation system and method with particle trap | Nathan J. Harder, Harry B. Curlett, Samuel Curlett | 2008-07-15 |
| 7258176 | Drill bit | Gordon A. Tibbitts, Harry B. Curlett, Samuel Curlett, Nathan J. Harder | 2007-08-21 |
| 6454457 | Mixing apparatus with rotary jet water valve | Michael J. Banse, Craig Allen Sneed | 2002-09-24 |
| 5570743 | Continuous multi-component slurrying process at oil or gas well | Stephen F. Crain, Wayne A. Handke, Jerry L. Logan, Calvin L. Stegemoeller, Ricky L. Covington +2 more | 1996-11-05 |
| 5538341 | Apparatus for mixing | Lanny R. Landram, Perry A. Jones | 1996-07-23 |
| 5522459 | Continuous multi-component slurrying process at oil or gas well | Stephen F. Crain, Wayne A. Handke, Jerry L. Logan, Calvin L. Stegemoeller, Ricky L. Covington +2 more | 1996-06-04 |
| 5452954 | Control method for a multi-component slurrying process | Wayne A. Handke, Stephen F. Crain, Calvin L. Stegemoeller, Vincent P. Rivera, Charles Edward Neal, III | 1995-09-26 |
| 5289877 | Cement mixing and pumping system and method for oil/gas well | Phillip Naegele, Ronald E. Dant, Kent Dieball, Stanley V. Stephenson | 1994-03-01 |