Assignee
SUMITOMO METAL IND
JP·785 granted patents·30 pending applications·16,397 citations·filing 1974–2013
Top patents by PatentIndex Score
815 records- 0198US6623869B1Metal material having good resistance to metal dustingSUMITOMO METAL IND·Filed 2003·Granted Sep 23, 2003·121 cites·24 claims
- 0297US7014720B2Austenitic stainless steel tube excellent in steam oxidation resistance and a manufacturing method thereofSUMITOMO METAL IND·Filed 2003·Granted Mar 21, 2006·59 cites·8 claims
- 0397US5938865AProcess for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistanceSUMITOMO METAL IND·Filed 1996·Granted Aug 17, 1999·66 cites·7 claims
- 0497US4673877AZirconium liner thickness measuring method and an apparatus therefor for a zirconium alloy tubeSUMITOMO METAL IND·Filed 1983·Granted Jun 16, 1987·62 cites·12 claims
- 0597US4470282AMethod of piercing in seamless tube manufacturingSUMITOMO METAL IND·Filed 1982·Granted Sep 11, 1984·36 cites·11 claims
- 0697US4421571AProcess for making high strength deep well casing and tubing having improved resistance to stress-corrosion crackingSUMITOMO METAL IND·Filed 1982·Granted Dec 20, 1983·59 cites·18 claims
- 0796US7727463B2Steel pipe for an airbag systemSUMITOMO METAL IND·Filed 2005·Granted Jun 1, 2010·14 cites·12 claims
- 0896US7264684B2Steel for steel pipesSUMITOMO METAL IND·Filed 2005·Granted Sep 4, 2007·33 cites·2 claims
- 0996US7101446B2Austenitic stainless steelSUMITOMO METAL IND·Filed 2005·Granted Sep 5, 2006·45 cites·2 claims
- 1096US7093469B2Manufacturing method and manufacturing apparatus of pipe, thickness deviation information derivation apparatus, and computer programSUMITOMO METAL IND·Filed 2005·Granted Aug 22, 2006·14 cites·28 claims
- 1196US6958099B2High toughness steel material and method of producing steel pipes using sameSUMITOMO METAL IND·Filed 2003·Granted Oct 25, 2005·80 cites·7 claims
- 1296US6458318B1Heat resistant nickel base alloySUMITOMO METAL IND·Filed 2000·Granted Oct 1, 2002·64 cites·24 claims
- 1396US6386271B1Method for continuous casting of steelSUMITOMO METAL IND·Filed 2000·Granted May 14, 2002·80 cites·11 claims
- 1496US6267828B1Low alloy steel for oil country tubular goods and method of makingSUMITOMO METAL IND·Filed 1999·Granted Jul 31, 2001·80 cites·8 claims
- 1596US6183573B1High-toughness, high-tensile-strength steel and method of manufacturing the sameSUMITOMO METAL IND·Filed 2000·Granted Feb 6, 2001·78 cites·8 claims
- 1696US6174365B1Apparatus for crystal growth and crystal growth method employing the sameSUMITOMO METAL IND·Filed 1999·Granted Jan 16, 2001·268 cites·56 claims
- 1796US6123769ACrystallization control method for organic compound and crystallization control solid-state component employed thereforSUMITOMO METAL IND·Filed 1999·Granted Sep 26, 2000·211 cites·5 claims
- 1896US5330850ACorrosion-resistant surface-coated steel sheetSUMITOMO METAL IND·Filed 1992·Granted Jul 19, 1994·152 cites·22 claims
- 1996US4649858ARepairing apparatus for furnace wallSUMITOMO METAL IND·Filed 1985·Granted Mar 17, 1987·88 cites·16 claims
- 2095US7635406B2Method for manufacturing a low alloy steel excellent in corrosion resistanceSUMITOMO METAL IND·Filed 2006·Granted Dec 22, 2009·31 cites·1 claims
- 2195US7445097B2Crash energy absorption memberSUMITOMO METAL IND·Filed 2006·Granted Nov 4, 2008·30 cites·11 claims
- 2295US7308812B2Process for producing seamless steel pipeSUMITOMO METAL IND·Filed 2006·Granted Dec 18, 2007·12 cites·1 claims
- 2395US7293443B2Method for manufacturing seamless pipes or tubesSUMITOMO METAL IND·Filed 2006·Granted Nov 13, 2007·9 cites·8 claims
- 2495US7146836B2Piercing method for manufacturing of seamless pipeSUMITOMO METAL IND·Filed 2006·Granted Dec 12, 2006·11 cites·4 claims
- 2595US6514359B2Heat resistant steelSUMITOMO METAL IND·Filed 2001·Granted Feb 4, 2003·50 cites·20 claims
- 2695US5533370ATube rolling method and apparatusSUMITOMO METAL IND·Filed 1993·Granted Jul 9, 1996·43 cites·28 claims
- 2795US5156807AMethod for improving machinability of titanium and titanium alloys and free-cutting titanium alloysSUMITOMO METAL IND·Filed 1991·Granted Oct 20, 1992·84 cites·8 claims
- 2895US4893658AFRP pipe with threaded endsSUMITOMO METAL IND·Filed 1988·Granted Jan 16, 1990·256 cites·20 claims
- 2995US4400211AAlloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion crackingSUMITOMO METAL IND·Filed 1982·Granted Aug 23, 1983·69 cites·22 claims
- 3095US4043798AProcess for producing steel having improved low temperature impact characteristicsSUMITOMO METAL IND·Filed 1975·Granted Aug 23, 1977·32 cites·23 claims
- 3194US7383710B2Seamless tube piercing/rolling apparatus, and seamless tube producing therewithSUMITOMO METAL IND·Filed 2006·Granted Jun 10, 2008·9 cites·12 claims
- 3294US7100410B2Method of manufacturing seamless tubeSUMITOMO METAL IND·Filed 2005·Granted Sep 5, 2006·10 cites·1 claims
- 3394US7074283B2Low alloy steelSUMITOMO METAL IND·Filed 2003·Granted Jul 11, 2006·35 cites·8 claims
- 3494US6988387B2Making method for seamless metallic tubeSUMITOMO METAL IND·Filed 2005·Granted Jan 24, 2006·20 cites·14 claims
- 3594US6702906B2Ni-base heat resistant alloy and welded joint thereofSUMITOMO METAL IND·Filed 2002·Granted Mar 9, 2004·40 cites·8 claims
- 3694US6659509B2Threaded joint for steel pipesSUMITOMO METAL IND·Filed 2003·Granted Dec 9, 2003·61 cites·13 claims
- 3794US6379476B1Stainless steel product for producing polymer electrode fuel cellSUMITOMO METAL IND·Filed 2000·Granted Apr 30, 2002·115 cites·28 claims
- 3894US6372057B1Steel alloy railway wheelsSUMITOMO METAL IND·Filed 2000·Granted Apr 16, 2002·31 cites·2 claims
- 3994US6220306B1Low carbon martensite stainless steel plateSUMITOMO METAL IND·Filed 1999·Granted Apr 24, 2001·59 cites·9 claims
- 4094US5829797AThreaded joint for oil well pipesSUMITOMO METAL IND·Filed 1995·Granted Nov 3, 1998·102 cites·10 claims
- 4194US5141566AProcess for manufacturing corrosion-resistant seamless titanium alloy tubes and pipesSUMITOMO METAL IND·Filed 1991·Granted Aug 25, 1992·87 cites·18 claims
- 4294US4630849AOil well pipe jointSUMITOMO METAL IND·Filed 1985·Granted Dec 23, 1986·185 cites·10 claims
- 4393US7951469B2Welding material and welded joint structureSUMITOMO METAL IND·Filed 2010·Granted May 31, 2011·6 cites·18 claims
- 4493US7666266B2Surface conditioning prior to chemical conversion treatment of a steel memberSUMITOMO METAL IND·Filed 2006·Granted Feb 23, 2010·86 cites·1 claims
- 4593US6869111B2Lubricating coating composition suitable for lubrication of a threaded jointSUMITOMO METAL IND·Filed 2002·Granted Mar 22, 2005·44 cites·17 claims
- 4693US6827996B2Threaded joint for steel pipes and process for the surface treatment thereofSUMITOMO METAL IND·Filed 2003·Granted Dec 7, 2004·34 cites·7 claims
- 4793US6746057B2Threaded joint for steel pipes having improved galling resistance and rust-preventing propertiesSUMITOMO METAL IND·Filed 2002·Granted Jun 8, 2004·45 cites·20 claims
- 4893US6379821B2Martensitic stainless steel welded pipeSUMITOMO METAL IND·Filed 2001·Granted Apr 30, 2002·39 cites·14 claims
- 4993US6217676B1Steel for oil well pipe with high corrosion resistance to wet carbon dioxide and seawater, and a seamless oil well pipeSUMITOMO METAL IND·Filed 1999·Granted Apr 17, 2001·52 cites·19 claims
- 5093US5705019APlasma processing apparatusSUMITOMO METAL IND·Filed 1996·Granted Jan 6, 1998·86 cites·5 claims
Showing the top 50 of 815 patent records by PatentIndex Score.
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