Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5843298 | Method of production of solids-free coal tar pitch | Ching-Feng Chang, Irwin C. Lewis, Richard L. Shao | 1998-12-01 |
| 5478442 | Treatment of petroleum cokes with a puffing inhibitor in a rotary calciner | — | 1995-12-26 |
| 5118287 | Treatment of petroleum cokes to inhibit coke puffing | Herbert C. Quandt, David R. Ball | 1992-06-02 |
| 5110359 | Treatment of petroleum cokes to inhibit coke puffing | Herbert C. Quandt, David R. Ball | 1992-05-05 |
| 4875979 | Treatment of petroleum cokes to inhibit coke puffing | Herbert C. Quandt, David R. Ball | 1989-10-24 |