B21C 37/158
Protrusions
Official title: {Protrusions, e.g. dimples}
B21C37/158 (Protrusions) appears on 32 US grants and 46 published applications in this corpus.
Search patents in B21C- Granted patents
- 32
- Published applications
- 46
- Assignees
- 35
- Inventors
- 104
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 3 |
| 2005 | 2 | 2 |
| 2006 | 0 | 4 |
| 2007 | 1 | 4 |
| 2008 | 0 | 1 |
| 2009 | 1 | 11 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 5 | 2 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 3 | 0 |
| 2016 | 0 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 1 |
| 2019 | 0 | 3 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing pipes having topographic inner structures2 Jun 2026US 12,644,654 B2Karlsruher Institut Fuer Technologie
- Method for producing a flat tube23 Apr 2024US 11,964,320 B2Mahle International GmbH
- Method of manufacturing vehicle body structure component to include reinforced regions9 May 2023US 11,642,712 B1GM Global Technology Operations LLC
- Method and tool for calibration of a hollow profile component produced by extrusion for automobile manufacturing1 Feb 2022US 11,235,367 B2Audi AG
- Structural member7 Dec 2021US 11,192,160 B2Aisin Keikinzoku Kabushiki Kaisha
- Method for producing pipes having topographic inner structures30 May 2024US 2024/0175644 A1Karlsruher Institut Fuer Technologie
- Method for producing a flat tube1 Jun 2023US 2023/0166317 A1Mahle International GmbH
- Shaft assembly and method of producing the same24 Nov 2022US 2022/0371068 A1
- Structural member12 Sep 2019US 2019/0275576 A1Aisin Keikinzoku Kabushiki Kaisha
- Method and tool for calibration of a hollow profile component produced by extrusion for automobile manufacturing28 Mar 2019US 2019/0091745 A1Audi AG
Most cited
By later US patents
- Fluid conveying tube as well as method and device for manufacturing the same16US 6,510,870 B1Valeo Engine Cooling AB · 2003
- Heat transfer tubes with internal extended surface13US 3,961,741 AFoster Wheeler Energy Corporation · 1976
- Flat tube, flat tube heat exchanger, and method of manufacturing same10US 8,091,621 B2Modine Manufacturing Company · 2012
- Rolled product for chain and method for producing same8US 6,393,818 B1Tsubakimoto Chain Co. · 2002
- Tool for making enhanced heat transfer surfaces8US 7,509,828 B2Wolverine Tube, Inc. · 2009