Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4569394 | Method and apparatus for increasing the concentration of proppant in well stimulation techniques | Ronald E. Sweatman, John Gottschling | 1986-02-11 |
| 4512405 | Pneumatic transfer of solids into wells | Ronald E. Sweatman, John Gottschling, John B. Simon | 1985-04-23 |