Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6474413 | Process for the reduction of the relative permeability to water in oil-bearing formations | Sérgio Luiz Pereira De Freitas Coelho, Carlos Roberto Carvalho De Holleben, Geraldo Maria Ramos de Godoy | 2002-11-05 |
| 4643254 | Process for the correction of oil well productivity and/or injectivity profiles | Adelman M. Ribeiro, Euclides J. Bonet, Celso C. M. Branco | 1987-02-17 |