Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4466883 | Needle coke process and product | Maurice K. Rausch, Gerald E. Tollefsen | 1984-08-21 | $33,874,000 |
| 4263127 | White oil process | Maurice K. Rausch, Gerald E. Tollefsen | 1981-04-21 | $17,236,000 |