Issued Patents All Time
Showing 26–50 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5103907 | Steam injection profile control agent and process | — | 1992-04-14 |
| 5104933 | Preparation of copolymers of polyvinyl alcohols | — | 1992-04-14 |
| 5101901 | Sand control agent and process | William P. Donlon, E. Thomas Strom | 1992-04-07 |
| 5100952 | Organically crosslinked polyvinyl alcohol copolymeric gels for use under harsh reservoir conditions | Dennis H. Hoskin | 1992-03-31 |
| 5088555 | Consolidation agent and method | — | 1992-02-18 |
| 5086089 | Programmed gelation of polymers using melamine resins | — | 1992-02-04 |
| 5071890 | Composition for selective placement of polymer gels for profile control in thermal oil recovery | Winston R. Shu | 1991-12-10 |
| 5022466 | Method for steam flooding profile control | Winston R. Shu | 1991-06-11 |
| 5015400 | Amino resins crosslinked polymer gels for permeability profile control | — | 1991-05-14 |
| 5003006 | Oil reservoir permeability control | A. S. Chu, Harold S. Chung, Dennis H. Hoskin, Thomas O. Mitchell | 1991-03-26 |
| 4991652 | Oil reservoir permeability profile control with crosslinked welan gum biopolymers | Dennis H. Hoskin, Thomas O. Mitchell | 1991-02-12 |
| 4981520 | Oil reservoir permeability profile control with crosslinked welan gum biopolymers | Dennis H. Hoskin, Thomas O. Mitchell | 1991-01-01 |
| 4980393 | Polymers for oil reservoir permeability control | — | 1990-12-25 |
| 4977960 | Sodium hydroxide treatment of field water in a biopolymer complex | Craig H. Phelps, Krishnaswamy Sampath | 1990-12-18 |
| 4974677 | Profile control process for use under high temperature reservoir conditions | — | 1990-12-04 |
| 4964463 | Crosslinked polyvinyl amine copolymer gels for use under harsh reservoir conditions | — | 1990-10-23 |
| 4964461 | Programmed gelation of polymers using melamine resins | — | 1990-10-23 |
| 4963597 | Selective gel system for permeability profile control | — | 1990-10-16 |
| 4950698 | Composition for selective placement of polymer gels for profile control in thermal oil recovery | Winston R. Shu | 1990-08-21 |
| 4940090 | Organically crosslinked polyvinyl alcohol copolymeric gels for use under harsh reservoir conditions | Dennis H. Hoskin | 1990-07-10 |
| 4940091 | Method for selectively plugging a zone having varying permeabilities with a temperature activated gel | Winston R. Shu | 1990-07-10 |
| 4917185 | Method to improve matrix acidizing in carbonates | Alfred R. Jennings, Jr., Lloyd G. Jones | 1990-04-17 |
| 4909324 | Block copolymers useful for enhanced oil recovery processes | — | 1990-03-20 |
| 4907656 | Method for preventing steam channelling into a non-aquifer bottom water zone | J. Michael Sanchez, E. Thomas Strom, Bassem R. Alameddine | 1990-03-13 |
| 4903768 | Method for profile control of enhanced oil recovery | — | 1990-02-27 |