B21C 37/12
Making tubes or metal hoses with helically arranged seams
B21C37/12 (Making tubes or metal hoses with helically arranged seams) appears on 276 US grants and 181 published applications in this corpus.
Search patents in B21C- Granted patents
- 276
- Published applications
- 181
- Assignees
- 146
- Inventors
- 417
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 5 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 11 | 0 |
| 1987 | 6 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 9 | 0 |
| 2000 | 8 | 0 |
| 2001 | 7 | 3 |
| 2002 | 6 | 8 |
| 2003 | 5 | 4 |
| 2004 | 4 | 3 |
| 2005 | 2 | 3 |
| 2006 | 4 | 3 |
| 2007 | 1 | 10 |
| 2008 | 5 | 8 |
| 2009 | 3 | 6 |
| 2010 | 3 | 7 |
| 2011 | 1 | 9 |
| 2012 | 3 | 10 |
| 2013 | 6 | 7 |
| 2014 | 7 | 8 |
| 2015 | 8 | 9 |
| 2016 | 6 | 13 |
| 2017 | 5 | 3 |
| 2018 | 7 | 12 |
| 2019 | 8 | 12 |
| 2020 | 8 | 11 |
| 2021 | 7 | 7 |
| 2022 | 7 | 10 |
| 2023 | 12 | 6 |
| 2024 | 4 | 4 |
| 2025 | 6 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21C 37/124The tubes having a special shape115
- B21C 37/121With seams being neither welded nor soldered87
- B21C 37/126Supply, or operations combined with supply, of strip material68
- B21C 37/122With welded or soldered seams56
- B21C 37/127Tube treating or manipulating combined with or specially adapted for use in45
- B21C 37/123Of coated strip material43
- B21C 37/128Control or regulating devices35
Recent patents
- Mobile factory of steel sheet coil helical pipe29 Sep 2026US 12,746,588 B2MEMPS-TUBOS HELI{grave over (C)}OIDAIS INDÚSTRIA E SERVIÇOS LTDA
- Spiral forming19 May 2026US 12,629,738 B2Keystone Tower Systems, Inc.
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Large container and method for producing a large container24 Jun 2025US 12,338,060 B2XL Beteiligungen GmbH & Co. KG
- Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip3 Jun 2025US 12,318,829 B2
- Bending machine27 Aug 2026US 2026/0249340 A1Odfjell Oceanwind AS
- Equipment and processes for sheet metal consolidation20 Aug 2026US 2026/0241437 A1Massachusetts Institute of Technology
- Smoothing insert26 Feb 2026US 2026/0055831 A1Baker Hughes Energy Technology UK Limited
- Method of manufacture of a reinforced pipe15 Jan 2026US 2026/0014611 A1Odfjell Oceanwind AS
- Zero scrap manufacturing methods for metal containers, and associated tooling9 Jan 2025US 2025/0010354 A1Stolle Machinery Company, LLC
Most cited
By later US patents
- Method and apparatus for winding a helical pipe from its inside51US 6,637,092 B1Rib Loc Australia Pty Ltd. · 2003
- Helical pipe lock seam45US 4,029,129 A1977
- Flexible corrugated tube45US 4,141,385 A1979
- Flexible piping method and apparatus of producing same44US 4,197,728 A1980
- Flexible cylindrical metal tube43US 3,938,558 AManufacturers Systems, Inc. · 1976