C21D 9/14
Wear-resistant or pressure-resistant pipes
Official title: wear-resistant or pressure-resistant pipes
C21D9/14 (Wear-resistant or pressure-resistant pipes) appears on 137 US grants and 151 published applications in this corpus.
Search patents in C21D- Granted patents
- 137
- Published applications
- 151
- Assignees
- 91
- Inventors
- 464
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 2 |
| 2003 | 0 | 1 |
| 2004 | 4 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 3 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 8 |
| 2010 | 1 | 10 |
| 2011 | 0 | 9 |
| 2012 | 6 | 9 |
| 2013 | 4 | 5 |
| 2014 | 6 | 8 |
| 2015 | 4 | 5 |
| 2016 | 3 | 16 |
| 2017 | 7 | 5 |
| 2018 | 12 | 9 |
| 2019 | 12 | 8 |
| 2020 | 3 | 5 |
| 2021 | 4 | 7 |
| 2022 | 5 | 8 |
| 2023 | 5 | 4 |
| 2024 | 6 | 9 |
| 2025 | 5 | 7 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of forming and heat treating coiled tubing22 Sep 2026US 12,742,232 B2Tenaris Coiled Tubes, LLC
- Method for production of a steel tubular product, in particular an airbag tubular product, and a steel tubular product produced using this method, in particular an airbag tubular product11 Aug 2026US 12,703,021 B2Benteler Steel/Tube GmbH
- Method of manufacturing high strength steel tubing from a steel composition and components thereof10 Mar 2026US 12,571,065 B2Tenaris Connections Limited
- Method of preparing a pipe-section16 Dec 2025US 12,498,057 B2Technip France
- Heat treated coiled tubing9 Dec 2025US 12,492,443 B2Tenaris Coiled Tubes, LLC
- High strength steel plate for hydrogen transport steel pipe, method for manufacturing high strength steel plate, and steel pipe for transporting hydrogen27 Aug 2026US 2026/0250816 A1Jfe Steel Corporation
- Stainless steel seamless pipe and method for manufacturing the same13 Aug 2026US 2026/0234775 A1Jfe Steel Corporation
- Seamless steel pipe and inflator bottle for airbag9 Jul 2026US 2026/0193760 A1Nippon Steel Corporation
- Sulfur-resistant and corrosion-resistant low-carbon alloy-based coiled tubing and preparation method thereof28 May 2026US 2026/0145278 A1Shinda (Tangshan) Creative Oil & Gas Equipment Co., Ltd.
- Heat treated coiled tubing26 Mar 2026US 2026/0085371 A1Tenaris Coiled Tubes, LLC
Most cited
By later US patents
- Method of fine-machining a workpiece surface to be supplied with a lubricant during operation of the workpiece54US 5,630,953 AMaschinenfabrik Gehring GmbH & Co. · 1997
- Method for making steel tubes or pipes of increased acidic gas resistance33US 4,721,536 AHoesch Aktiengesellschaft · 1988
- Heat treated high strength bimetallic cylinder32US 4,596,282 AXaloy, Inc. · 1986
- Method of making ultra high strength steel having good toughness32US 8,414,715 B2Siderca S.A.I.C. · 2013
- Coiled tube with varying mechanical properties for superior performance and methods to produce the same by a continuous heat treatment29US 10,480,054 B2Tenaris Coiled Tubes, LLC · 2019