Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872971 | Progressive flow cracking of coal/oil mixtures with high metals content catalyst | — | 1989-10-10 |
| 4822761 | Method and apparatus for cooling fluid solid particles used in a regeneration system | Paul W. Walters, Lloyd E. Busch | 1989-04-18 |