B21C 37/20
Making helical or similar guides in or on tubes without removing material
Official title: Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies {; Making tubes with angled walls, ribbed tubes or tubes with decorated walls}
B21C37/20 (Making helical or similar guides in or on tubes without removing material) appears on 287 US grants and 154 published applications in this corpus.
Search patents in B21C- Granted patents
- 287
- Published applications
- 154
- Assignees
- 161
- Inventors
- 531
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 2 | 0 |
| 1982 | 8 | 0 |
| 1983 | 2 | 0 |
| 1984 | 12 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 13 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 9 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 15 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 5 | 3 |
| 2002 | 7 | 6 |
| 2003 | 7 | 15 |
| 2004 | 9 | 9 |
| 2005 | 10 | 10 |
| 2006 | 2 | 6 |
| 2007 | 5 | 12 |
| 2008 | 4 | 3 |
| 2009 | 4 | 7 |
| 2010 | 3 | 5 |
| 2011 | 2 | 7 |
| 2012 | 2 | 3 |
| 2013 | 6 | 6 |
| 2014 | 4 | 4 |
| 2015 | 4 | 6 |
| 2016 | 4 | 2 |
| 2017 | 6 | 3 |
| 2018 | 2 | 7 |
| 2019 | 2 | 5 |
| 2020 | 4 | 6 |
| 2021 | 7 | 10 |
| 2022 | 7 | 7 |
| 2023 | 2 | 4 |
| 2024 | 2 | 2 |
| 2025 | 6 | 2 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices and method for shaping a tubular hollow element29 Sep 2026US 12,746,587 B2FELSS Systems GmbH
- Umbilical10 Mar 2026US 12,571,286 B2Onesubsea, LLC
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Inner spiral grooved tube with excellent heat transfer property and heat exchanger10 Jun 2025US 12,326,304 B2MA Aluminum Corporation
- Asymmetric flow path topology27 May 2025US 12,313,351 B2General Electric Company
- 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
- Method and mechanical arrangement for producing a wall profile on a plastically deformable hollow body wall5 Mar 2026US 2026/0061470 A1FELSS Systems GmbH
- Extruded heat pipe15 Jan 2026US 2026/0014608 A1Intel Corporation
- In-situ solar tracker manufacturing22 May 2025US 2025/0164154 A1
Most cited
By later US patents
- Deformable member175US 6,896,049 B2Zeroth Technology Ltd. · 2005
- Formed hose couplings86US 4,330,142 AFayette Tubular Products · 1982
- Heat transfer tube having internal ridges, and method of making same84US 4,660,630 AWolverine Tube, Inc. · 1987
- Metal framing system65US 6,279,289 B12001
- Heat transfer tubes and method for manufacturing49US 5,259,448 AMitsubishi Shindoh Co., Ltd. · 1993