Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5282508 | Process to increase petroleum recovery from petroleum reservoirs | Olav Ellingsen, Carlos Roberto Carvalho de Holleben, Carlos Alberto de Castro Goncalves, Paulo Jose Villani de Andrade, Roberto F. Mezzomo | 1994-02-01 |