Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6043203 | Compositions based on APG and ester quat surfactants | Allen D. Urfer, Nuria Bonastre | 2000-03-28 |
| 5627144 | Composition for enhanced crude oil recovery operations containing hydrochloric acid or hydrofluoric acid, or mixtures thereof with ester quaternary ammonium compounds or/and alkyl quaternary ammonium compounds | Allen D. Urfer, Nuria Bonastre | 1997-05-06 |