Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6203606 | Performance grade asphalt and methods | Foster L. Wade | 2001-03-20 |
| 5447628 | Reconstituting lubricating oil | Charles W. Harrison, Arthur G. Gorneau, Robert M. Steinberg | 1995-09-05 |
| 5306419 | Used lubricating oil reclaiming | Charles W. Harrison, Arthur G. Gorneau, Robert M. Steinberg | 1994-04-26 |