Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7838468 | High molecular weight polyamine salts as clay stabilizing agents | David J. Poelker, John A. Schield | 2010-11-23 |
| 7601675 | Polyamine salts as clay stabilizing agents | David J. Poelker, John A. Schield | 2009-10-13 |
| 7328745 | High molecular weight polyamine salts as clay stabilizing agents | David J. Poelker, John A. Schield | 2008-02-12 |
| 7314951 | Process and composition for lower toxicity quaternary ammonium compounds | Gordon T. Rivers | 2008-01-01 |
| 7284610 | Polyamine salts as clay stabilizing agents | David J. Poelker, John A. Schield | 2007-10-23 |
| 6855672 | Copolymers useful for gelling acids | David J. Poelker, Dee Harkey | 2005-02-15 |