Korf Engineering GmbH
31Patents
0Active
31Granted
34Portfolio score
Filing activity: Feb 4, 1977 → Aug 28, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4448402A | Apparatus for directly making liquid pig-iron from coarse iron ore | Chemistry; Metallurgy | 26 | Expired |
| US4861369A | Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4588437A | Method for producing molten pig iron or steel pre-products in a melt-down gasifier | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4605205A | Arrangement comprising a gasifier and a direct reduction furnace | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4725308A | Process for producing molten pig iron or steel pre-products | Chemistry; Metallurgy | 17 | Expired |
| US4728360A | Process for the production of molten pig iron and steel pre-products | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4895593A | Process of recovering molten pig iron or steel pre-products from lumpy iron-oxide and scrap using a fluidized bed | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4699655A | Process and a plant for the direct reduction of iron oxide particles in a shaft furnace and for smelting the obtained iron sponge particles in a meltdown gasifier | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4543123A | Process for the direct production of sponge iron particles and liquid crude iron from iron ore in lump form | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4846449A | Melting gasifier | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4806154A | Process for the production of pig iron from fine ore using plasma burner | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4784689A | Process for producing sponge iron particles and molten pig iron | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4673432A | Process for the production of pig iron | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4542889A | Installation for the direct production of sponge iron particles and liquid crude iron from iron ore in lump form | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4805880A | Fluidized bed arrangement for the production of molten pig iron and steel pre-products | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4955587A | Arrangement for recovering molten pig iron or steel pre-products from lumpy iron-oxide containing charging substances | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4854967A | Process for producing carburized sponge iron | Chemistry; Metallurgy | 9 | Expired |
| US4755219A | Process for producing molten pig iron or steel raw material | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4708736A | Method of producing molten pig iron or steel pre-products from particulate ferrous material | Chemistry; Metallurgy | 8 | Expired |
| US4793857A | Process for cooling and cleaning producer gas and top gas | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4850574A | Apparatus for cooling and cleaning producer gas and top gas | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4857284A | Process for removing sulphur from the waste gas of a reduction shaft furnace | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4874037A | Apparatus for cooling a hot product gas | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4851039A | Process for the production of pig iron using cyclone | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4804319A | Process for compacting iron particles and subsequent breaking apart of the compacted iron band | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.