Issued Patents All Time
Showing 51–56 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4305809 | Fixed sulfur petroleum coke fuel and method for its production | Nai Y. Chen | 1981-12-15 |
| 4302324 | Delayed coking process | Nai Y. Chen | 1981-11-24 |
| 4299594 | Process for utilizing waste lubricating oils | Bruce P. Pelrine | 1981-11-10 |
| 4247384 | Liquefaction of carbonaceous materials | Nai Y. Chen, Tsoung Y. Yan, Darrell D. Whitehurst | 1981-01-27 |
| 4233138 | Process for the visbreaking of high-metals crudes and resids | Louis D. Rollmann | 1980-11-11 |
| 4203830 | Visbreaking process for demetalation and desulfurization of heavy oil | Louis D. Rollmann | 1980-05-20 |