KORTEC AG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 122

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5465942 Tuyere arrangement for the introduction of agents into a molten bath and method of operating such a tuyere arrangementMar 02, 94Nov 14, 95[C21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5580362 Process for gasification and/or reformingExpiredJan 12, 95Dec 03, 96[C10J]
5571475 Reducing and smelting furnace having filter layerExpiredOct 06, 94Nov 05, 96[C21B]
5451246 Process and device for heating and melting lumps of sponge ironExpiredMar 18, 94Sep 19, 95[C21B]
5403378 Method and apparatus for protecting an injection device disposed in a hot blast conduit of a blast furnaceExpiredJun 29, 93Apr 04, 95[C21B]
5371759 D.C. furnace with a hearth electrode, hearth electrode and electrode block, as well as process for operating said furnaceExpiredAug 10, 93Dec 06, 94[H05B]
5364448 Process for the production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out the processExpiredMay 03, 93Nov 15, 94[C22B]
5290016 Arrangement for cooling vessel portions of a furnace, in particular a metallurgical furnaceExpiredDec 07, 92Mar 01, 94[F27D]
5201941 Process for introducing additive substances which are capable of flow into a metallurgical vessel and a vessel for that processExpiredAug 23, 91Apr 13, 93[C21C]
4949940 Charging arrangement for shaft furnaces, in particular blast furnacesExpiredOct 12, 89Aug 21, 90[C21B]
4881972 Process for feeding heat energy into a molten metal bathExpiredOct 14, 88Nov 21, 89[C22B]
4852858 Charging material preheater for preheating charging material for a metallurgical smelting unitExpiredApr 20, 88Aug 01, 89[C22B]
4736930 Closure apparatus for a tap holeExpiredJun 13, 86Apr 12, 88[C21C]
4687440 Apparatus for heating charging materialExpiredAug 05, 86Aug 18, 87[F72B]
4586897 Installation including a heating furnace for continuous castings, which are cut to length, from a continuous casting installationExpiredJun 11, 85May 06, 86[F27B, B21B, C21B]
4555266 Method and apparatus for treating liquid metal in a vesselExpiredAug 29, 83Nov 26, 85[C21B]
4424955 Apparatus for treating liquid metal in a vesselExpiredOct 05, 81Jan 10, 84[C21C]
4401466 Process for protection of nozzles and refractory lining of a vessel for refining molten metalExpiredNov 30, 81Aug 30, 83[C21C]
4396178 Open-hearth furnaceExpiredJun 11, 82Aug 02, 83[C21C]
4347079 Method of operating an open-hearth furnaceExpiredMar 12, 81Aug 31, 82[C21C]

Top Inventors for This Owner

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