Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808298 | Process for reducing resid hydrotreating solids in a fractionator | Lawrence B. Peck, George L. Ott, Jeffry A. Cox | 1989-02-28 |
| 4804458 | Process for collecting vapor in ebullated bed reactors | John R. Frey | 1989-02-14 |