Inventor · disambiguated record
Hisashi Amaya
Also filed as: AMAYA HISASHI · AMAYA HISASHI AMAYA
25 granted patents·7 pending applications·124 citations·filing 1999–2023
94Inventor score
Files withSUMITOMO METAL IND9NIPPON STEEL & SUMITOMO METAL CORP5AMAYA HISASHI4IGARASHI MASAAKI2NIPPON STEEL CORP2
Top patents by PatentIndex Score
32 records- 0195US9322087B2Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil wellNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Granted Apr 26, 2016·5 cites·4 claims
- 0292US6210806B1Martensitic stainless steel having oxide scale layersSUMITOMO METAL IND·Filed 1999·Granted Apr 3, 2001·44 cites·8 claims
- 0389US7767039B2Martensitic stainless steelSUMITOMO METAL IND·Filed 2006·Granted Aug 3, 2010·7 cites·4 claims
- 0488US9783876B2Stainless steel for oil wells and stainless steel pipe for oil wellsNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted Oct 10, 2017·5 cites·15 claims
- 0588US8608872B2High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistanceKONDO KUNIO·Filed 2011·Granted Dec 17, 2013·5 cites·4 claims
- 0681US8784581B2Fe-Ni alloy pipe stock and method for manufacturing the sameIGARASHI MASAAKI·Filed 2006·Granted Jul 22, 2014·5 cites·4 claims
- 0781US7082992B2Oil well steel pipe for embedding-expandingSUMITOMO METAL IND·Filed 2005·Granted Aug 1, 2006·3 cites·8 claims
- 0881US6159311AMartensitic stainless steel pipe and method for manufacturing the sameSUMITOMO METAL IND·Filed 2000·Granted Dec 12, 2000·13 cites·10 claims
- 0980US7225868B2Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipeSUMITOMO METAL IND·Filed 2003·Granted Jun 5, 2007·11 cites·4 claims
- 1079US10995394B2Steel bar for downhole member, and downhole memberNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted May 4, 2021·1 cites·4 claims
- 1176US7238434B2Welded structure having improved resistance to stress corrosion crackingSUMITOMO METAL IND·Filed 2006·Granted Jul 3, 2007·2 cites·16 claims
- 1270US9109268B2Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil wellTAKABE HIDEKI·Filed 2011·Granted Aug 18, 2015·1 cites·8 claims
- 1368US2025179618A1Steel materialNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 1468US2025215544A1Steel materialNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 1567US7458426B2Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipeSUMITOMO METAL IND·Filed 2007·Granted Dec 2, 2008·1 cites·5 claims
- 1666US9771628B2Duplex stainless steel and production method thereforMOTOYA DAISUKE·Filed 2012·Granted Sep 26, 2017·1 cites·9 claims
- 1766US8701455B2Method for manufacturing a high alloy pipeSAGARA MASAYUKI·Filed 2009·Granted Apr 22, 2014·2 cites·2 claims
- 1865US9034125B2Method for manufacturing Ni base alloy pipe stockNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted May 19, 2015·0 cites·4 claims
- 1964US9579870B2Welded joint of duplex stainless steelNAGAYAMA HIROYUKI·Filed 2012·Granted Feb 28, 2017·2 cites·32 claims
- 2064US9555496B2Process for producing welded joint using GMA welding and CO2 as a shielding gasNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted Jan 31, 2017·1 cites·10 claims
- 2162US6440234B1Martensitic stainless steel productsSUMITOMO METAL IND·Filed 1999·Granted Aug 27, 2002·12 cites·10 claims
- 2258US8157930B2Martensitic stainless steelAMAYA HISASHI·Filed 2004·Granted Apr 17, 2012·3 cites·8 claims
- 2357US2007181225A1Ni base alloy pipe stock and method for manufacturing the sameIGARASHI MASAAKI·Filed 2006·Application pending·0 cites
- 2455US8163233B2Martensitic stainless steel for welded structuresAMAYA HISASHI·Filed 2009·Granted Apr 24, 2012·0 cites·8 claims
- 2552US10000832B2Duplex stainless steelTAKABE HIDEKI·Filed 2012·Granted Jun 19, 2018·0 cites·14 claims
- 2648US9303296B2High-strength stainless steel for oil well and high-strength stainless steel pipe for oil wellOHE TARO·Filed 2012·Granted Apr 5, 2016·0 cites·8 claims
- 2745US2012177529A1Duplex stainless steelAMAYA HISASHI·Filed 2012·Application pending·0 cites
- 2844US2013315776A1Duplex stainless steelYAMADA KENTA·Filed 2012·Application pending·0 cites
- 2943US2011014083A1Stainless steel used for oil country tubular goodsSUMITOMO METAL IND·Filed 2010·Application pending·0 cites
- 3041US9090957B2Martensitic stainless steel oil country tubular goodAMAYA HISASHI·Filed 2004·Granted Jul 28, 2015·0 cites·4 claims
- 3141US2009158799A1Metal Pipe and Manufacturing Method ThereofTAKEISHI YOSHIAKI·Filed 2006·Application pending·0 cites
- 3227US8071020B2High strength Cr-Ni alloy material and seamless pipe for oil wellOTOME YOHEI·Filed 2009·Granted Dec 6, 2011·0 cites·8 claims
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