Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4858693 | Compositions and methods for reducing the permeability of underground strata | Martin Navratil, Mark S. Mitchell | 1989-08-22 | $9,834,000 |
| 4836285 | Composition and methods for reducing the permeability of underground strata | Martin Navratil, Mark S. Mitchell | 1989-06-06 | $20,862,000 |
| 4811787 | Method for reducing the permeability of underground strata during secondary recovery of oil | Martin Navratil, Jimmy P. Baytycky, Mark S. Mitchell | 1989-03-14 | $8,513,000 |
| 4743633 | Compositions and methods for reducing the permeability of underground strata | Martin Navratil, Mark S. Mitchell | 1988-05-10 | $28,554,000 |
| 4663367 | Compositions and methods for reducing the permeability of underground strata | Martin Navratil, Mark S. Mitchell | 1987-05-05 | $24,501,000 |