B21C 37/10
Making tubes with seams being neither welded nor soldered
Official title: Making tubes with {seams being neither welded nor soldered, e.g.} riveted seams {(with helically arranged seams B21C37/121)}
B21C37/10 (Making tubes with seams being neither welded nor soldered) appears on 77 US grants and 65 published applications in this corpus.
Search patents in B21C- Granted patents
- 77
- Published applications
- 65
- Assignees
- 57
- Inventors
- 139
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 3 |
| 2003 | 4 | 1 |
| 2004 | 2 | 5 |
| 2005 | 4 | 1 |
| 2006 | 3 | 8 |
| 2007 | 0 | 3 |
| 2008 | 1 | 6 |
| 2009 | 6 | 3 |
| 2010 | 2 | 0 |
| 2011 | 1 | 0 |
| 2012 | 2 | 7 |
| 2013 | 2 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 3 |
| 2017 | 0 | 0 |
| 2018 | 1 | 3 |
| 2019 | 4 | 5 |
| 2020 | 1 | 3 |
| 2021 | 5 | 3 |
| 2022 | 3 | 0 |
| 2023 | 1 | 4 |
| 2024 | 1 | 0 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21C 37/104The tubes having a special shape34
- B21C 37/101Making of the seams27
- B21C 37/108Without continuous longitudinal movement of the sheet during the bending operation18
- B21C 37/107Tube treating or manipulating combined with or specially adapted for use in8
- B21C 37/102Of coated strip material3
- B21C 37/105Supply, or operations combined with supply, of strip material3
Recent patents
- Pocket flange forming device for duct3 Mar 2026US 12,564,872 B2Jinwoong Technology Co., Ltd.
- Air cooled condenser and related methods4 Mar 2025US 12,240,068 B2Holtec International
- Seam forming apparatus for elbow duct4 Feb 2025US 12,214,396 B2
- Cylindrical body and apparatus24 Dec 2024US 12,172,845 B2Canon Kabushiki Kaisha
- Methods for making layered tubular structures10 Oct 2023US 11,779,981 B2
- In-situ solar tracker manufacturing22 May 2025US 2025/0164154 A1
- Thermally broken structural tube1 May 2025US 2025/0135519 A1
- Thin-walled pipe, metallic flat material and method for producing a thin-walled pipe23 Jan 2025US 2025/0027583 A1Scherdel Innotec Forschungs-Und Entwicklungs-GmbH
- Pocket flange forming device for duct28 Dec 2023US 2023/0415214 A1Jinwoong Technology Co., Ltd.
- Seam forming apparatus for elbow duct10 Aug 2023US 2023/0249238 A1
Most cited
By later US patents
- Tubular structures and knurling systems and methods of manufacture and use thereof118US 9,933,092 B2Deflecto, LLC · 2018
- Structure of lightweight bars and connector means therefore105US 4,069,638 AScanovator AB · 1978
- Method and apparatus for forming box-shaped sheet metal ducts36US 5,105,640 AIowa Precision Industries, Inc. · 1992
- Method of increasing the fatigue life and/or reducing stress concentration cracking of coiled metal tubing30US 5,515,707 APrecision Tube Technology, Inc. · 1996
- Apparatus and method for forming seamed tube25US 4,513,596 AEagle Precision Tool Ltd. · 1985