Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859284 | Combined process for the separation and continuous coking of high softening point asphaltenes | Roland Rammler, Hans-Jurgen Weiss, Rodolfo B. Solari, Rafael Hidalgo | 1989-08-22 |