Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11292953 | Method of producing hydroxyalkylcarbamate-functional polyamides and uses thereof | Robert Carl Steves, David C. Lewis | 2022-04-05 |
| 11124693 | Hydroxyalkylurethane kinetic hydrate inhibitors | Marek K. Pakulski, David C. Lewis | 2021-09-21 |
| 11008503 | Water-in-oil hydraulic fracturing fluid and method of using such | Robert Carl Steves, David C. Lewis | 2021-05-18 |
| 10731070 | Poly (vinyl carprolactam) kinetic gas hydrate inhibitor and method for preparing the same | Marek K. Pakulski, Jay Riethmeyer, David C. Lewis | 2020-08-04 |
| 6855795 | Catalyst removal process | Howard P. Klein, Kenneth Hillman | 2005-02-15 |
| 6710203 | Preparation of hydroxyalkylcarbamates from six-membered cyclic carbonates | Howard P. Klein, Edward T. Marquis, James R. Machac, Jr. | 2004-03-23 |
| 6498278 | Alkoxylation of 6-membered alkylene carbonates | Howard P. Klein, Edward T. Marquis | 2002-12-24 |
| 6479593 | Absorbent polymer modification | Howard P. Klein, Edward T. Marquis, James R. Machac, Jr., Katty Darragas | 2002-11-12 |
| 6262297 | Preparation of hydroxyalkylcarbamates from six-membered cyclic carbonates | Howard P. Klein, Edward T. Marquis, James R. Machac, Jr. | 2001-07-17 |
| 4275752 | Fluid flow apparatus and method | Nigel A. Collier | 1981-06-30 |