Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10597945 | Coiled-tubing fluid-lubricant composition and related methods | — | 2020-03-24 |
| 8664171 | Nitrated extreme pressure additives and blends | Donald Stevenson | 2014-03-04 |
| 8058317 | Nitrated extreme pressure additives and blends | — | 2011-11-15 |
| 7960323 | Nitrated extreme pressure additives | — | 2011-06-14 |
| 7470735 | Phenol-free phosphites | Donald Stevenson, Mark E. Harr, Michael Jakupca | 2008-12-30 |
| 7294684 | Dimeric and polymeric alkylphenol polysulfides | Donald Stevenson, Satyan Kodali | 2007-11-13 |
| 6362260 | Phenol-free phosphite stabilizers | Donald Stevenson | 2002-03-26 |
| 5364895 | Hydrolytically stable pentaerythritol diphosphites | Donald Stevenson, Arthur W. McRowe | 1994-11-15 |