B21C 37/15
Making tubes of special shape
Official title: Making tubes of special shape; Making {tube} fittings {(B21C37/0803, B21C37/104, B21C37/124 take precedence)}
B21C37/15 (Making tubes of special shape) appears on 1,281 US grants and 877 published applications in this corpus.
Search patents in B21C- Granted patents
- 1,281
- Published applications
- 877
- Assignees
- 760
- Inventors
- 2,581
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 21 | 0 |
| 1978 | 27 | 0 |
| 1979 | 26 | 0 |
| 1980 | 28 | 0 |
| 1981 | 22 | 0 |
| 1982 | 21 | 0 |
| 1983 | 18 | 0 |
| 1984 | 30 | 0 |
| 1985 | 22 | 0 |
| 1986 | 23 | 0 |
| 1987 | 24 | 0 |
| 1988 | 26 | 0 |
| 1989 | 22 | 0 |
| 1990 | 19 | 0 |
| 1991 | 19 | 0 |
| 1992 | 18 | 0 |
| 1993 | 17 | 0 |
| 1994 | 17 | 0 |
| 1995 | 18 | 0 |
| 1996 | 30 | 0 |
| 1997 | 19 | 0 |
| 1998 | 41 | 0 |
| 1999 | 43 | 0 |
| 2000 | 39 | 0 |
| 2001 | 40 | 15 |
| 2002 | 39 | 49 |
| 2003 | 34 | 41 |
| 2004 | 34 | 38 |
| 2005 | 34 | 49 |
| 2006 | 16 | 37 |
| 2007 | 16 | 42 |
| 2008 | 18 | 36 |
| 2009 | 9 | 37 |
| 2010 | 23 | 33 |
| 2011 | 13 | 40 |
| 2012 | 23 | 32 |
| 2013 | 25 | 41 |
| 2014 | 26 | 28 |
| 2015 | 31 | 38 |
| 2016 | 33 | 25 |
| 2017 | 24 | 21 |
| 2018 | 22 | 30 |
| 2019 | 17 | 38 |
| 2020 | 30 | 39 |
| 2021 | 40 | 51 |
| 2022 | 30 | 39 |
| 2023 | 32 | 33 |
| 2024 | 22 | 21 |
| 2025 | 32 | 13 |
| 2026 | 10 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21C 37/20Making helical or similar guides in or on tubes without removing material287
- B21C 37/28Making tube fittings for connecting pipes239
- B21C 37/16Making tubes with varying diameter in longitudinal direction202
- B21C 37/154Making multi-wall tubes162
- B21C 37/22Making finned or ribbed tubes by fixing strip or like material to159
- B21C 37/151Making tubes with multiple passages144
- B21C 37/155Making tubes with non-circular section99
- B21C 37/156Making tubes with wall irregularities98
All 9 subgroupsShow fewer
Recent patents
- Devices and method for shaping a tubular hollow element29 Sep 2026US 12,746,587 B2FELSS Systems GmbH
- Method and device for perforating a pipe wall25 Aug 2026US 12,715,029 B2T-Drill Oy
- Vehicle front rail11 Aug 2026US 12,703,427 B2Shape Corp.
- 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 and apparatus for calibrating a metal profile blank24 Sep 2026US 2026/0284731 A1Norsk Hydro ASA
- Method and mechanical arrangement for producing a tubular hollow body from a tubular hollow body blank, in particular for producing a hollow shaft from a shaft blank13 Aug 2026US 2026/0233293 A1FELSS Systems GmbH
- Coil Loading Assembly, System and Method13 Aug 2026US 2026/0233964 A1
- Method for Producing a Folded Flat Tube23 Jul 2026US 2026/0208279 A1Mahle International GmbH
- Method for manufacturing a multi-chamber profile and multi-chamber profile4 Jun 2026US 2026/0151815 A1
Most cited
By later US patents
- Deformable member175US 6,896,049 B2Zeroth Technology Ltd. · 2005
- Apparatus for manufacturing profile pipes used in well construction123US 5,119,661 A1992
- Method of making micro channel heat pipe having corrugated fin elements105US 6,216,343 B1The United States of America as represented by the Secretary of the Air Force · 2001
- Metal coiled tubing with signal transmitting passageway94US 5,542,472 ACamco International Inc. · 1996
- Multiple piece torch tip89US 4,200,235 AVictor Equipment Company · 1980