Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4362625 | Waste water clarifier | — | 1982-12-07 |
| 4360420 | Distillation and solvent extraction process for rerefining used lubricating oil | Laird C. Fletcher, Richard H. O'Blasny | 1982-11-23 |
| 4342645 | Method of rerefining used lubricating oil | Laird C. Fletcher | 1982-08-03 |