Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12312552 | Agent for forming solid lubricating coating film, oil country tubular goods, threaded joint for oil country tubular goods, and method for manufacturing oil country tubular goods | Seigo Goto, Takashi Koga, Takamasa Kawai, Seiji Ozaki, Hideo Sato +6 more | 2025-05-27 |
| 11486531 | Thermal-insulated multi-walled pipe for superconducting power transmission | Akio Sato, Shigeto Sakashita | 2022-11-01 |
| 11414719 | High strength stainless steel seamless pipe for oil country tubular goods | Kenichiro Eguchi | 2022-08-16 |
| 11306369 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for producing same | Yuichi Kamo, Masao Yuga, Kenichiro Eguchi | 2022-04-19 |
| 11286548 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Yuichi Kamo, Masao Yuga, Kenichiro Eguchi | 2022-03-29 |
| 11193179 | Seamless stainless steel pipe for oil country tubular goods and method of manufacturing the same | Kazuki Fujimura, Seigo Goto | 2021-12-07 |
| 11085095 | High-strength seamless stainless steel pipe for oil country tubular goods and method of manufacturing high-strength seamless stainless steel pipe | Kenichiro Eguchi | 2021-08-10 |
| 11072835 | High-strength seamless stainless steel pipe for oil country tubular goods, and method for producing the same | Kenichiro Eguchi | 2021-07-27 |
| 11075508 | Thermal-insulated multi-walled pipe for superconducting power transmission and laying method therefor | Akio Sato, Shigeto Sakashita | 2021-07-27 |
| 10971286 | Thermal-insulated multi-walled pipe for superconducting power transmission | Akio Sato, Shigeto Sakashita | 2021-04-06 |
| 10920297 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Mitsuhiro Okatsu, Seiji Nabeshima, Hiroki Ota | 2021-02-16 |
| 10876182 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Seiji Nabeshima, Mitsuhiro Okatsu, Hiroki Ota | 2020-12-29 |
| 10876183 | High-strength seamless stainless steel pipe and method of manufacturing high-strength seamless stainless steel pipe | Kenichiro Eguchi, Takeshi Suzuki, Kazuki Fujimura, Hiroki Ota | 2020-12-29 |
| 10844453 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Seiji Nabeshima, Mitsuhiro Okatsu, Hiroki Ota | 2020-11-24 |
| 10640856 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Mitsuhiro Okatsu, Kazuki Fujimura | 2020-05-05 |
| 10472690 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Mitsuhiro Okatsu, Kazuki Fujimura | 2019-11-12 |
| 10329633 | High-strength seamless stainless steel pipe for oil country tubular goods and method for manufacturing the same | Kazuki Fujimura, Tetsu Nakahashi, Hideo Sato | 2019-06-25 |
| 10240221 | Stainless steel seamless pipe for oil well use and method for manufacturing the same | Kenichiro Eguchi | 2019-03-26 |
| 10151011 | High-strength stainless steel seamless tube or pipe for oil country tubular goods, and method of manufacturing the same | Kenichiro Eguchi | 2018-12-11 |
| 10151012 | High-strength stainless steel pipe | Kenichiro Eguchi, Takeshi Suzuki, Hideo Sato, Tetsu Nakahashi | 2018-12-11 |
| 10023930 | Method of manufacturing high strength stainless steel tube or pipe | Kenichiro Eguchi | 2018-07-17 |
| 9995669 | Round bar tensile test specimen for sulfide stress corrosion cracking test of a steel, test method for sulfide stress corrosion cracking of steel, and seamless steel pipe having excellent resistance to sulfide stress corrosion cracking | Masao Yuga, Kazuki Fujimura, Mitsuhiro Okatsu, Yoshiyuki Sugano | 2018-06-12 |
| 9932651 | Thick-walled high-strength seamless steel pipe with excellent sour resistance for pipe for pipeline, and process for producing same | Mitsuo Kimura, Kenichiro Eguchi, Hiroshi Yokogawa, Tadao Katagiri, Masahito Tanaka | 2018-04-03 |
| 9758850 | High strength stainless steel seamless pipe with excellent corrosion resistance for oil well and method of manufacturing the same | Kenichiro Eguchi, Yukio Miyata, Mitsuo Kimura | 2017-09-12 |
| 9708681 | High-strength seamless steel pipe for oil well use having excellent resistance to sulfide stress cracking | Kenichiro Eguchi, Yukio Miyata | 2017-07-18 |