Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852650 | Hydraulic fracturing with a refractory proppant combined with salinity control | Alfred R. Jennings, Jr. | 1989-08-01 |
| 4838351 | Proppant for use in viscous oil recovery | Alfred R. Jennings, Jr. | 1989-06-13 |
| 4817717 | Hydraulic fracturing with a refractory proppant for sand control | Alfred R. Jennings, Jr. | 1989-04-04 |
| 4811790 | Well bore device and method for sand control | Alfred R. Jennings, Jr. | 1989-03-14 |