Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024753 | Material separation efficiency determination employing fluorescing control particles | Colin D. Chriswell, William H. Buttermore | 1991-06-18 |
| 4859212 | Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization | Colin D. Chriswell, Surender M. Kaushik, Navin D. Shah | 1989-08-22 |