B21C 37/154
Making multi-wall tubes
Official title: {Making multi-wall tubes}
B21C37/154 (Making multi-wall tubes) appears on 162 US grants and 151 published applications in this corpus.
Search patents in B21C- Granted patents
- 162
- Published applications
- 151
- Assignees
- 144
- Inventors
- 418
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 2 |
| 2002 | 6 | 9 |
| 2003 | 4 | 5 |
| 2004 | 3 | 0 |
| 2005 | 4 | 11 |
| 2006 | 1 | 4 |
| 2007 | 2 | 3 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 5 |
| 2011 | 1 | 9 |
| 2012 | 2 | 6 |
| 2013 | 5 | 11 |
| 2014 | 4 | 4 |
| 2015 | 6 | 6 |
| 2016 | 5 | 6 |
| 2017 | 3 | 5 |
| 2018 | 1 | 8 |
| 2019 | 4 | 8 |
| 2020 | 9 | 15 |
| 2021 | 13 | 13 |
| 2022 | 2 | 6 |
| 2023 | 10 | 7 |
| 2024 | 4 | 4 |
| 2025 | 8 | 1 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for manufacturing a magnet and systems and devices including a magnet16 Jun 2026US 12,653,989 B2Stereotaxis, Inc.
- Additive manufacturing of multilayered structures16 Jun 2026US 12,654,417 B2FMC Technologies, Inc.
- Method for producing pipes having topographic inner structures2 Jun 2026US 12,644,654 B2Karlsruher Institut Fuer Technologie
- Wire drawing method and wire drawing device14 Oct 2025US 12,440,879 B2Hitachi, Ltd.
- Shear-assisted extrusion assemblies and methods26 Aug 2025US 12,397,334 B2Battelle Memorial Institute
- Additive manufacturing of multilayered structures23 Oct 2025US 2025/0326197 A1FMC Technologies, Inc.
- Method for manufacturing a double-wall heat-exchanger tube5 Dec 2024US 2024/0399440 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Shear-assisted extrusion assemblies and methods19 Sep 2024US 2024/0307939 A1Battelle Memorial Institute
- A method of manufacturing a double-walled elbow pipe segment, a pipe assembly29 Aug 2024US 2024/0288099 A1Pipeflex Systems Ltd
- Method for producing pipes having topographic inner structures30 May 2024US 2024/0175644 A1Karlsruher Institut Fuer Technologie
Most cited
By later US patents
- Method of forming a double wall, air gap exhaust duct component66US 5,170,557 ABenteler Industries, Inc. · 1992
- Multi-layered anti-coking heat resisting metal tube and the method for manufacturing thereof52US 6,337,459 B12002
- Method of producing multiple-wall composite pipes50US 4,332,073 AKawasaki Jukogyo Kabushiki Kaisha · 1982
- Method of prestressing a tubular apparatus44US 4,538,442 AThe Babcock & Wilcox Company · 1985
- Composite dual tubing38US 4,410,013 ANippon Steel Corporation · 1983