Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6447672 | CONTINUOUS PLURAL STAGE HEATED VAPOR INJECTION PROCESS FOR RECOVERING LUBE OIL BASE STOCKS FROM USED MOTOR OIL FORMULATIONS, AND ASPHALT BLEND COMPOSITIONS CONTAINING USED MOTOR OIL BOTTOMS FROM SAID PROCESS | Donald P. Malone | 2002-09-10 |
| 6402937 | “Pumped” recycle vapor | Arthur G. Shaffer, Jr. | 2002-06-11 |
| 6402938 | Vaporization of used motor oil with non-hydrogenating recycle vapor | Arthur G. Shaffer, Jr. | 2002-06-11 |