Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36922 | Process of used lubricant oil recycling | Steven W. Sparks, Gerald J. Teitman | 2000-10-24 |
| 5258115 | Delayed coking with refinery caustic | Roland H. Heck, Tom Reischman, Gerald J. Teitman | 1993-11-02 |
| 5200061 | Delayed coking | — | 1993-04-06 |
| 5143597 | Process of used lubricant oil recycling | Steven W. Sparks, Gerald J. Teitman | 1992-09-01 |