Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4726761 | Method and apparatus for introducing combustion air into a combustion chamber | — | 1988-02-23 |
| 4685882 | Pulverized fuel slurry burner and method of operating same | Steve B. Londerville | 1987-08-11 |
| 4462795 | Method of operating a wall fired duct heater | Ralph R. Vosper, Arie W. Spoormaker, Norman E. Harthun | 1984-07-31 |
| 4387654 | Method for firing a rotary kiln with pulverized solid fuel | Louis D. Siegert | 1983-06-14 |
| 4375952 | Wall fired duct heater | Ralph R. Vosper, Arie W. Spoormaker, Norman E. Harthun | 1983-03-08 |
| 4310299 | Method for firing a rotary kiln with pulverized solid fuel | Louis D. Siegert | 1982-01-12 |
| 4303386 | Parallel flow burner | Temple S. Voorheis, Ralph R. Vosper, Norman E. Harthun | 1981-12-01 |
| 4286945 | Wall fired duct heater | Ralph R. Vosper, Arie W. Spoormaker, Norman E. Harthun | 1981-09-01 |
| 4230449 | Self contained compact burner | Ralph R. Vosper, Norman E. Harthun | 1980-10-28 |