Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7395858 | Process for the selective controlled reduction of the relative water permeability in high permeability oil-bearing subterranean formations | Luis Cesar Ferreira Barbosa, Sérgio Luiz Pereira de Freitas Coelho, Priscila Moczydlower, Edson de Souza Leite | 2008-07-08 |
| 6474413 | Process for the reduction of the relative permeability to water in oil-bearing formations | Luiz Cesar Ferreira Barbosa, Sérgio Luiz Pereira De Freitas Coelho, Carlos Roberto Carvalho De Holleben | 2002-11-05 |