Issued Patents 1989
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871021 | Block copolymers useful for enhanced oil recovery processes | — | 1989-10-03 |
| 4859717 | Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith | Dennis H. Hoskin | 1989-08-22 |
| 4851143 | Amino resin modified xanthan polymer gels for permeability profile control | — | 1989-07-25 |
| 4834180 | Amino resins crosslinked polymer gels for permeability profile control | — | 1989-05-30 |
| 4834182 | Polymers for oil reservoir permeability control | — | 1989-05-30 |
| 4830108 | Amino resin modified xanthan polymer foamed with a chemical blowing agent | Randy D. Hazlett | 1989-05-16 |
| 4811789 | Minimizing formation damage under adverse conditions during gravel pack operations | Alfred R. Jennings, Jr. | 1989-03-14 |
| 4809782 | Block copolymers useful for enhanced oil recovery processes | — | 1989-03-07 |
| 4810732 | Amino resin modified polymer gels for permeability control | — | 1989-03-07 |
| 4804043 | Process for selective placement of polymer gels for profile control in thermal oil recovery | Winston R. Shu | 1989-02-14 |