Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6634442 | Process for using biodegradable drilling muds | Christian Zurdo, Alain Rabion, Laurent Fraisse, Michel Guillerme | 2003-10-21 |
| 6426321 | Biodegradable drilling mud and process for its preparation | Anne Basseres, Michel Guillerme, Christian Zurdo | 2002-07-30 |
| 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, Jean-Pierre Binon, Gerard Provin, Jean-Jacques Fery | 1990-12-04 |