Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5242899 | Emulsfiying agent, reverse emulsions produced using this emulsifying agent and use of these emulsions in drilling wells | — | 1993-09-07 |
| 4975483 | Process for treating an aqueous solution of acrylamide resin in order to enable it to gel slowly even at high temperature | Marie-Christine P. Leblanc, Josiane Durrieu, Gerard Provin, Jean-Jacques Fery | 1990-12-04 |