B21C 37/08
Making tubes with welded or soldered seams
Official title: Making tubes with welded or soldered seams {(with helically arranged seams B21C37/122)}
B21C37/08 (Making tubes with welded or soldered seams) appears on 597 US grants and 572 published applications in this corpus.
Search patents in B21C- Granted patents
- 597
- Published applications
- 572
- Assignees
- 368
- Inventors
- 1,329
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 11 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 12 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 9 | 0 |
| 1993 | 9 | 0 |
| 1994 | 12 | 0 |
| 1995 | 10 | 0 |
| 1996 | 4 | 0 |
| 1997 | 12 | 0 |
| 1998 | 12 | 0 |
| 1999 | 16 | 0 |
| 2000 | 18 | 0 |
| 2001 | 12 | 11 |
| 2002 | 21 | 25 |
| 2003 | 13 | 22 |
| 2004 | 13 | 20 |
| 2005 | 7 | 26 |
| 2006 | 9 | 24 |
| 2007 | 11 | 16 |
| 2008 | 5 | 21 |
| 2009 | 11 | 25 |
| 2010 | 11 | 16 |
| 2011 | 11 | 22 |
| 2012 | 8 | 22 |
| 2013 | 14 | 18 |
| 2014 | 10 | 32 |
| 2015 | 27 | 27 |
| 2016 | 21 | 23 |
| 2017 | 24 | 20 |
| 2018 | 15 | 26 |
| 2019 | 22 | 27 |
| 2020 | 16 | 46 |
| 2021 | 19 | 27 |
| 2022 | 27 | 14 |
| 2023 | 20 | 16 |
| 2024 | 8 | 23 |
| 2025 | 13 | 11 |
| 2026 | 12 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21C 37/0815Without continuous longitudinal movement of the sheet during the bending operation115
- B21C 37/0803The tubes having a special shape109
- B21C 37/0807Tube treating or manipulating combined with, or specially adapted for use in103
- B21C 37/083Supply, or operations combined with supply, of strip material94
- B21C 37/09Of coated strip material67
- B21C 37/0822Guiding or aligning the edges of the bent sheet54
- B21C 37/0818Manufacture of tubes by drawing of strip material through dies32
- B21C 37/0826Preparing the edges of the metal sheet with the aim of having15
All 9 subgroupsShow fewer
Recent patents
- High-strength hot rolled steel sheet and method for producing the same, and high-strength electric resistance welded steel pipe and method for producing the same15 Sep 2026US 12,735,758 B2Jfe Steel Corporation
- Vehicle front rail11 Aug 2026US 12,703,427 B2Shape Corp.
- Hot-stretch-reduced electric resistance welded pipe4 Aug 2026US 12,698,543 B2Nippon Steel Corporation
- Beam assembly with multi-hollow formation30 Jun 2026US 12,668,202 B2Shape Corp.
- Steel pipe for line pipe with excellent low temperature toughness of welded zone and method for manufacturing the same28 Apr 2026US 12,611,704 B2Nexteel Co., Ltd.
- Steel pipe out-of-roundness prediction method, steel pipe out-of-roundness control method, steel pipe manufacturing method, steel pipe out-of-roundness prediction model generation method, and steel pipe out-of-roundness prediction device8 Oct 2026US 2026/0307127 A1Jfe Steel Corporation
- Seam position detection method, manufacturing method of welded steel pipe, quality control method of welded steel pipe, seam position detection apparatus, and manufacturing equipment of welded steel pipe8 Oct 2026US 2026/0307128 A1Jfe Steel Corporation
- Production method of electric resistance welded steel pipe and electric resistance welded steel pipe27 Aug 2026US 2026/0249378 A1Nippon Steel Corporation
- Impedance sheet, mandrel of electric-resistance welded pipe manufacturing device, and method for manufacturing electric-resistance welded pipe27 Aug 2026US 2026/0249380 A1Nippon Steel Corporation
- Multi-station rotary fully automatic beading machine for micro probes20 Aug 2026US 2026/0241429 A1Suzhou Uigreen Micro&Nano Technology Co. Ltd.
Most cited
By later US patents
- Metal coiled tubing with signal transmitting passageway94US 5,542,472 ACamco International Inc. · 1996
- Continuous manufacturing method for a metal welded tube and a manufacturing apparatus therefor66US 5,140,123 AKusakabe Electric & Machinery Co., Ltd. · 1992
- Heat transfer tubes and method for manufacturing61US 5,052,476 A501 Mitsubishi Shindoh Co., Ltd. · 1991
- Method and apparatus for installing electrical logging cable inside coiled tubing60US 5,121,872 AHydrolex, Inc. · 1992
- Hydroformed tubular member and method of hydroforming tubular members48US 6,216,509 B1R. J. Tower Corporation · 2001