Issued Patents All Time
Showing 51–75 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903767 | Selective gelation polymer for profile control in CO.sub.2 flooding | Krishnaswamy Sampath | 1990-02-27 |
| 4903766 | Selective gel system for permeability profile control | — | 1990-02-27 |
| 4901795 | Method for imparting selectivity to otherwise nonselective polymer control gels | Craig H. Phelps, E. Thomas Strom, Dennis H. Hoskin, Thomas O. Mitchell | 1990-02-20 |
| 4899818 | Method to improve use of polymers for injectivity profile control in enhanced oil recovery | Alfred R. Jennings, Jr., Mark L. Hoefner | 1990-02-13 |
| 4898242 | Method for suspending wells | Alfred R. Jennings, Jr. | 1990-02-06 |
| 4896724 | Method for suspending wells | Randy D. Hazlett, Alfred R. Jennings, Jr. | 1990-01-30 |
| 4896723 | Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith | Dennis H. Hoskin | 1990-01-30 |
| 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 |
| 4785028 | Gels for profile control in enhanced oil recovery under harsh conditions | Dennis H. Hoskin, Thomas O. Mitchell | 1988-11-15 |
| 4776398 | Oil reservoir permeability control | A. S. Chu, Harold S. Chung, Dennis H. Hoskin, Thomas O. Mitchell | 1988-10-11 |
| 4716966 | Amino resin modified xanthan polymer gels for permeability profile control | — | 1988-01-05 |
| 4678032 | Polymer and method for permeability profile control under severe reservoir conditions | — | 1987-07-07 |
| 4676930 | Zirconium crosslinked gel compositions, methods of preparation and application in enhanced oil recovery | Marie Wszolek | 1987-06-30 |
| 4606407 | Programmed gelation of polymers for oil reservoir permeability control | — | 1986-08-19 |
| 4604188 | Thermal upgrading of residual oil to light product and heavy residual fuel | Tsoung Y. Yan | 1986-08-05 |
| 4530757 | Process for upgrading heavy crude oils | Lillian A. Rankel | 1985-07-23 |