Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8001788 | Method and apparatus for preparing pulverized coal used to produce synthesis gas | William N. Martin | 2011-08-23 |
| 6164956 | System and method for removing ash deposits in a combustion device | Roy Payne, Blair A. Folsom | 2000-12-26 |
| 6152054 | Method and system for the disposal of coal preparation plant waste coal through slurry co-firing in cyclone-fired boilers to effect a reduction in nitrogen oxide emissions | Robert A. Ashworth, W. Richard Carson, Todd A. Melick | 2000-11-28 |
| 5988081 | Method and system for the disposal of coal preparation plant waste coal through slurry co-firing in cyclone-fired boilers to effect a reduction in nitrogen oxide emissions | Robert A. Ashworth, W. Richard Carson, Todd A. Melick | 1999-11-23 |