Masanao Seo

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Patents Grantslast 30 patents

Information Patent Grant
Steel for oil country tubular goods and method of producing the same
- Patent number 10,407,758
- Issue date Sep 10, 2019
- Nippon Steel Corporation
- Tomohiko Omura
- C21 - METALLURGY OF IRON
Information Patent Grant
Stainless steel for oil wells and stainless steel pipe for oil wells
- Patent number 9,783,876
- Issue date Oct 10, 2017
- Nippon Steel & Sumitomo Metal Corporation
- Shinjiro Nakatsuka
- C21 - METALLURGY OF IRON
Information Patent Grant
Oil-well steel pipe having excellent sulfide stress cracking resist...
- Patent number 9,777,352
- Issue date Oct 3, 2017
- Nippon Steel & Sumitomo Metal Corporation
- Atsushi Soma
- C21 - METALLURGY OF IRON
Information Patent Grant
Method for quenching steel pipe and method for producing steel pipe...
- Patent number 9,267,186
- Issue date Feb 23, 2016
- Nippon Steel & Sumitomo Metal Corporation
- Masanao Seo
- C21 - METALLURGY OF IRON

Patents Applicationslast 30 patents

Information Patent Application
STEEL FOR OIL COUNTRY TUBULAR GOODS AND METHOD OF PRODUCING THE SAME
- Publication number 20150114527
- Publication date Apr 30, 2015
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Tomohiko Omura
- C21 - METALLURGY OF IRON
Information Patent Application
STAINLESS STEEL FOR OIL WELLS AND STAINLESS STEEL PIPE FOR OIL WELLS
- Publication number 20150047831
- Publication date Feb 19, 2015
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Shinjiro Nakatsuka
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
OIL-WELL STEEL PIPE HAVING EXCELLENT SULFIDE STRESS CRACKING RESIST...
- Publication number 20140205487
- Publication date Jul 24, 2014
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Atsushi Soma
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD FOR QUENCHING STEEL PIPE AND METHOD FOR PRODUCING STEEL PIPE...
- Publication number 20130160903
- Publication date Jun 27, 2013
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Masanao Seo
- C21 - METALLURGY OF IRON