Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9278362 | Fractal orifice plate | Grant A. Gelven | 2016-03-08 |
| 6524362 | Method of melting fine grained direct reduced iron in an electric arc furnace | Heinz Eichberger, Siegfried Schimo, Michael Stroeder | 2003-02-25 |
| 5465942 | Tuyere arrangement for the introduction of agents into a molten bath and method of operating such a tuyere arrangement | Georg Raidl, Walter Schmelzer | 1995-11-14 |
| 5451246 | Process and device for heating and melting lumps of sponge iron | — | 1995-09-19 |
| 5403378 | Method and apparatus for protecting an injection device disposed in a hot blast conduit of a blast furnace | Ralph Weber | 1995-04-04 |
| 5371759 | D.C. furnace with a hearth electrode, hearth electrode and electrode block, as well as process for operating said furnace | Emil Elsner | 1994-12-06 |
| 5201941 | Process for introducing additive substances which are capable of flow into a metallurgical vessel and a vessel for that process | — | 1993-04-13 |
| 4881972 | Process for feeding heat energy into a molten metal bath | Ralph Weber | 1989-11-21 |
| 4736930 | Closure apparatus for a tap hole | Ralph Weber | 1988-04-12 |
| 4687440 | Apparatus for heating charging material | — | 1987-08-18 |
| 4555266 | Method and apparatus for treating liquid metal in a vessel | — | 1985-11-26 |
| 4553528 | Free-standing stove and fireplace apparatus | — | 1985-11-19 |
| 4424955 | Apparatus for treating liquid metal in a vessel | — | 1984-01-10 |
| 4401466 | Process for protection of nozzles and refractory lining of a vessel for refining molten metal | Dalton Nose | 1983-08-30 |
| 4396178 | Open-hearth furnace | — | 1983-08-02 |
| 4389043 | Metallurgical melting and refining unit | Ralph Weber | 1983-06-21 |
| 4347079 | Method of operating an open-hearth furnace | — | 1982-08-31 |
| 4254756 | Fireplace apparatus | — | 1981-03-10 |