Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749659 | Controlled release rate fertilizers and methods of making same | Zhimin Yu, Mark Ernest Grist | 2004-06-15 |
| 4506733 | Additive for inclusion in a heavy oil reservoir undergoing steam injection | Peter D. Clark | 1985-03-26 |
| 4487264 | Use of hydrogen-free carbon monoxide with steam in recovery of heavy oil at low temperatures | J. David Tyrer | 1984-12-11 |