Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481360 | Ultra fine fly ash and a system for collecting the same | R. F. Ridgeway, J. F. Mainieri | 2002-11-19 |
| 6447580 | Electrostatic precipitator | R. F. Ridgeway, J. F. Mainieri | 2002-09-10 |
| 6398848 | Method of separating a low density fly ash fraction from an overall group of fly ash | R. F. Ridgeway, J. F. Mainieri | 2002-06-04 |