B21C 37/22
Making finned or ribbed tubes by fixing strip or like material to
Official title: Making finned or ribbed tubes by fixing strip or like material to tubes
B21C37/22 (Making finned or ribbed tubes by fixing strip or like material to) appears on 159 US grants and 92 published applications in this corpus.
Search patents in B21C- Granted patents
- 159
- Published applications
- 92
- Assignees
- 106
- Inventors
- 318
- Latest grant
- 4 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 1 |
| 2003 | 3 | 2 |
| 2004 | 2 | 1 |
| 2005 | 2 | 3 |
| 2006 | 0 | 1 |
| 2007 | 0 | 4 |
| 2008 | 1 | 4 |
| 2009 | 0 | 12 |
| 2010 | 3 | 2 |
| 2011 | 2 | 10 |
| 2012 | 6 | 3 |
| 2013 | 2 | 7 |
| 2014 | 4 | 3 |
| 2015 | 3 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 3 |
| 2018 | 1 | 3 |
| 2019 | 1 | 3 |
| 2020 | 4 | 6 |
| 2021 | 4 | 6 |
| 2022 | 6 | 7 |
| 2023 | 1 | 5 |
| 2024 | 3 | 0 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air cooled condenser and related methods4 Mar 2025US 12,240,068 B2Holtec International
- Rotor shaft14 Jan 2025US 12,199,492 B2Metal Forming & Coining Corporation
- Method for producing a flat tube23 Apr 2024US 11,964,320 B2Mahle International GmbH
- Tube assembly for heat management apparatus and method of manufacturing the same12 Mar 2024US 11,927,397 B2Hyundai Mobis Co., Ltd.
- Aircraft heat exchanger finned plate manufacture13 Feb 2024US 11,898,809 B2Rtx Corporation
- Coil Loading Assembly, System and Method13 Aug 2026US 2026/0233964 A1
- Automatic welding machine for forming longitudinal ribs on tubes16 Jan 2025US 2025/0018495 A1Chastnoe Uchrezhdenie Po Obespecheniyu Nauchnogo Razvitiya Atomnoj Otrasli "Nauka I Innovacii"
- Rotor shaft16 Jan 2025US 2025/0023417 A1
- Method for producing a flat tube1 Jun 2023US 2023/0166317 A1Mahle International GmbH
- Air cooled condenser and related methods16 Mar 2023US 2023/0080268 A1Holtec International
Most cited
By later US patents
- 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
- Condenser for use in a car cooling system81US 4,825,941 AShowa Aluminum Corporation · 1989
- Tube provided with inner fins and outer fins or pins, particularly for heat exchangers, and method therefor61US 4,306,619 A1981
- Multiple piece tube assembly for use in heat exchangers59US 4,805,693 AModine Manufacturing Company · 1989
- Internally finned tube41US 4,163,474 AE. I. Du Pont de Nemours and Company · 1979