Assignee
PO HANG IRON & STEEL
KR·76 granted patents·1,085 citations·filing 1981–2001
Top patents by PatentIndex Score
76 records- 0193US5431753AManufacturing process for austenitic high manganese steel having superior formability, strengths and weldabilityPO HANG IRON & STEEL·Filed 1992·Granted Jul 11, 1995·62 cites·3 claims
- 0288US5647922AProcess for manufacturing high manganese hot rolled steel sheet without any crackPO HANG IRON & STEEL·Filed 1995·Granted Jul 15, 1997·44 cites·6 claims
- 0387US6296046B1Edge dam position control method and device in twin roll strip casting processPO HANG IRON & STEEL·Filed 1998·Granted Oct 2, 2001·55 cites·6 claims
- 0487US6264759B1Wire rods with superior drawability and manufacturing method thereforPO HANG IRON & STEEL·Filed 1999·Granted Jul 24, 2001·32 cites·7 claims
- 0587US5733387ADuplex stainless steel, and its manufacturing methodPO HANG IRON & STEEL·Filed 1996·Granted Mar 31, 1998·47 cites·12 claims
- 0686US6713593B2Copolymer comprising alkylene carbonate and method of preparing samePO HANG IRON & STEEL·Filed 2001·Granted Mar 30, 2004·28 cites·15 claims
- 0786US5584910AProcess for producing molten pig iron or molten steel pre-productsPO HANG IRON & STEEL·Filed 1993·Granted Dec 17, 1996·37 cites·19 claims
- 0880US6315029B1Continuous casting method, and device thereforPO HANG IRON & STEEL·Filed 1999·Granted Nov 13, 2001·20 cites·9 claims
- 0978US6408222B1Apparatus and a method for controlling thickness of a strip in a twin roll strip casting devicePO HANG IRON & STEEL·Filed 1998·Granted Jun 18, 2002·23 cites·10 claims
- 1078US5571343AAustenitic stainless steel having superior press-formability, hot workability and high temperature oxidation resistance, and manufacturing process thereforPO HANG IRON & STEEL·Filed 1995·Granted Nov 5, 1996·36 cites·9 claims
- 1176US6585798B2Fluidized bed reactor for preventing the fine iron ore from sticking therein and method thereofPO HANG IRON & STEEL·Filed 2000·Granted Jul 1, 2003·15 cites·17 claims
- 1275US6517604B1Apparatus and method for measuring the molten metal level in electromagnetic continuous castingPO HANG IRON & STEEL·Filed 2000·Granted Feb 11, 2003·10 cites·12 claims
- 1375US5810950AMethods for annealing and pickling high manganic cold rolled steel sheetPO HANG IRON & STEEL·Filed 1996·Granted Sep 22, 1998·22 cites·6 claims
- 1474US6427507B1Apparatus for measuring the strip flatnessPO HANG IRON & STEEL·Filed 2000·Granted Aug 6, 2002·15 cites·14 claims
- 1572US6202792B1Apparatus for lubricating edge dam in twin-roll type strip casting machine, and method thereforPO HANG IRON & STEEL·Filed 1998·Granted Mar 20, 2001·15 cites·9 claims
- 1672US5507189AApparatus for evaluating plane strain stretch formability, and method thereforPO HANG IRON & STEEL·Filed 1993·Granted Apr 16, 1996·42 cites·10 claims
- 1771US5785733AFluidized bed type reduction apparatus for iron ore particles and method for reducing iron ore particles using the apparatusPO HANG IRON & STEEL·Filed 1995·Granted Jul 28, 1998·29 cites·36 claims
- 1870US6110413A3-Stage fluidized bed type fine iron ore reducing apparatus having x-shaped circulating tubesPO HANG IRON & STEEL·Filed 1997·Granted Aug 29, 2000·26 cites·4 claims
- 1969US6277324B1Apparatus for manufacturing molten pig iron and reduced iron by utilizing a fluidized bedPO HANG IRON & STEEL·Filed 1998·Granted Aug 21, 2001·24 cites·8 claims
- 2067US6797372B2Resin-coated steel for fuel tanks of automobile and method for manufacturing the samePO HANG IRON & STEEL·Filed 2000·Granted Sep 28, 2004·9 cites·7 claims
- 2165US5803988AMethod for manufacturing non-oriented electrical steel sheet showing superior adherence of insulating coated layerPO HANG IRON & STEEL·Filed 1996·Granted Sep 8, 1998·24 cites·4 claims
- 2263US6773518B2Cold rolled steel sheet having excellent corrosion resistance to sulfuric acidPO HANG IRON & STEEL·Filed 2001·Granted Aug 10, 2004·4 cites·1 claims
- 2363US6346212B1ConverterPO HANG IRON & STEEL·Filed 2000·Granted Feb 12, 2002·8 cites·10 claims
- 2462US7045043B1Method of reducing a band mark of an electroplating steel sheetPO HANG IRON & STEEL·Filed 2000·Granted May 16, 2006·5 cites·22 claims
- 2562US6978531B1Method of manufacturing hot rolled steel sheet using mini mill processPO HANG IRON & STEEL·Filed 1999·Granted Dec 27, 2005·12 cites·10 claims
- 2662US6565671B1Surface-treated steel sheet coated with chromate film for fuel tanks and method of fabricating the samePO HANG IRON & STEEL·Filed 2000·Granted May 20, 2003·7 cites·7 claims
- 2762US5653821AMethod for manufacturing oriented electrical steel sheet by heating slab at low temperaturePO HANG IRON & STEEL·Filed 1994·Granted Aug 5, 1997·24 cites·12 claims
- 2861US6086653ASmelting-reduction apparatus and method for producing molten pig iron using the smelting reduction apparatusPO HANG IRON & STEEL·Filed 1997·Granted Jul 11, 2000·10 cites·8 claims
- 2961US5762681AFluidized bed type reduction apparatus for iron ores and method for reducing iron ores using the apparatusPO HANG IRON & STEEL·Filed 1995·Granted Jun 9, 1998·20 cites·44 claims
- 3061US5441699AApparatus for automatically analyzing liquid test samplesPO HANG IRON & STEEL·Filed 1993·Granted Aug 15, 1995·35 cites·11 claims
- 3160US6451128B1Method for manufacturing high magnetic flux denshy grain oriented electrical steel sheet based on low temperature slab heating methodPO HANG IRON & STEEL·Filed 1998·Granted Sep 17, 2002·14 cites·22 claims
- 3260US6319458B1Pulverized coal injecting apparatusPO HANG IRON & STEEL·Filed 1999·Granted Nov 20, 2001·21 cites·14 claims
- 3358US6190469B1Method for manufacturing high strength and high formability hot-rolled transformation induced plasticity steel containing copperPO HANG IRON & STEEL·Filed 1997·Granted Feb 20, 2001·16 cites·5 claims
- 3456US6667105B1Coating composition for forming insulating films, non-oriented electrical steel sheet with the coating composition coated thereon, and method for forming the insulating films on the steel sheetPO HANG IRON & STEEL·Filed 2000·Granted Dec 23, 2003·7 cites·8 claims
- 3554US5082748AFe-mn alloy plated steel sheet and manufacturing method thereofPO HANG IRON & STEEL·Filed 1989·Granted Jan 21, 1992·16 cites·6 claims
- 3652US6258186B1Method for manufacturing hot rolled galvanized steel sheet at high speed, with pickling skippedPO HANG IRON & STEEL·Filed 1999·Granted Jul 10, 2001·15 cites·8 claims
- 3752US5989309AMethod for injecting fine iron ore in smelting reducing processPO HANG IRON & STEEL·Filed 1996·Granted Nov 23, 1999·10 cites·8 claims
- 3852US5575973AHigh strength high toughness spring steel, and manufacturing process thereforPO HANG IRON & STEEL·Filed 1994·Granted Nov 19, 1996·13 cites·2 claims
- 3951US6387538B1Surface-treated steel sheet for fuel tanks and method of fabricating samePO HANG IRON & STEEL·Filed 1999·Granted May 14, 2002·17 cites·31 claims
- 4051US5897829AApparatus for reducing fine iron orePO HANG IRON & STEEL·Filed 1996·Granted Apr 27, 1999·11 cites·6 claims
- 4147US5976277AHigh speed tool steel, and manufacturing method thereforPO HANG IRON & STEEL·Filed 1997·Granted Nov 2, 1999·7 cites·7 claims
- 4247US5913987AFinish treatment method and silicon steel sheet manufactured by direct casting methodPO HANG IRON & STEEL·Filed 1997·Granted Jun 22, 1999·10 cites·13 claims
- 4347US4419274ANonmetallic catalyst compositions for oxidation of ammonia and process for making the catalystPO HANG IRON & STEEL·Filed 1981·Granted Dec 6, 1983·14 cites·18 claims
- 4445US6235079B1Two step twin-single fluidized bed pre-reduction apparatus for pre-reducing fine iron ore, and method thereforPO HANG IRON & STEEL·Filed 1998·Granted May 22, 2001·8 cites·6 claims
- 4544US6042892AApparatus for coating zinc on steel sheet, and method thereforPO HANG IRON & STEEL·Filed 1997·Granted Mar 28, 2000·17 cites·54 claims
- 4643US5919281A2-stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnacePO HANG IRON & STEEL·Filed 1996·Granted Jul 6, 1999·6 cites·13 claims
- 4743US5746804AApparatus for melting fine particles containing carbon and method for melting such fine particles using the apparatusPO HANG IRON & STEEL·Filed 1995·Granted May 5, 1998·7 cites·25 claims
- 4841US6228142B1Apparatus for keeping optimal penetration depth formed at front end of oxygen tuyere and method for keeping the samePO HANG IRON & STEEL·Filed 1997·Granted May 8, 2001·6 cites·6 claims
- 4941US6212928B1Method for manufacturing thin cold rolled inner shield steel sheet with superior magnetic field shielding propertyPO HANG IRON & STEEL·Filed 1999·Granted Apr 10, 2001·6 cites·2 claims
- 5041US5334416AHeat resistant stainless steel coated by diffusion of aluminum and the coating method thereofPO HANG IRON & STEEL·Filed 1992·Granted Aug 2, 1994·12 cites·16 claims
Showing the top 50 of 76 patent records by PatentIndex Score.
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