Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846962 | Removal of basic nitrogen compounds from extracted oils by use of acidic polar adsorbents and the regeneration of said adsorbents | — | 1989-07-11 |
| 4808300 | Simultaneous removal of aromatics and wax from lube distillate by an adsorption process | — | 1989-02-28 |
| 4512878 | Used oil re-refining | Lloyd E. Reid, Douglas G. Ryan | 1985-04-23 |