Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985068 | Method and apparatus for smelting iron oxide | Glenn E. Hoffmann | 1991-01-15 |
| 4685964 | Method and apparatus for producing molten iron using coal | Frank V. Summers, David C. Meissner, Glenn E. Hoffman | 1987-08-11 |
| 4470581 | Apparatus for selective reduction of metallic oxides | William A. Ahrendt, David C. Meissner, Charles W. Sanzenbacher | 1984-09-11 |
| 4381939 | Method for selective reduction of metallic oxides | William A. Ahrendt, David C. Meissner, Charles W. Sanzenbacher | 1983-05-03 |
| 4365789 | Apparatus for the direct reduction of iron in a shaft furnace using gas from coal | Charles W. Sanzenbacher | 1982-12-28 |
| 4331470 | Method for the direct reduction of iron in a shaft furnace using gas from coal | Charles W. Sanzenbacher | 1982-05-25 |
| 4316739 | Method for producing molten iron | Donald Beggs | 1982-02-23 |
| 4286775 | Apparatus for producing molten iron from iron oxide with coal and oxygen | Charles W. Sanzenbacher | 1981-09-01 |
| 4270740 | Apparatus for producing molten iron by submerged combustion | Charles W. Sanzenbacher | 1981-06-02 |
| 4260412 | Method of producing direct reduced iron with fluid bed coal gasification | Frank V. Summers, David C. Meissner | 1981-04-07 |
| 4248626 | Method for producing molten iron from iron oxide with coal and oxygen | Charles W. Sanzenbacher | 1981-02-03 |
| 4238226 | Method for producing molten iron by submerged combustion | Charles W. Sanzenbacher | 1980-12-09 |
| 4235425 | Impact bed gasifier-melter | Donald Beggs | 1980-11-25 |
| 4234169 | Apparatus for the direct reduction of iron and production of fuel gas using gas from coal | Donald Beggs | 1980-11-18 |
| 4225340 | Method for the direct reduction of iron using gas from coal | Donald Beggs | 1980-09-30 |
| 4205830 | Apparatus for the direct reduction of iron using gas from coal | Donald Beggs, Ullrich-Horst Buskies | 1980-06-03 |
| 4201571 | Method for the direct reduction of iron and production of fuel gas using gas from coal | Donald Beggs | 1980-05-06 |