B21C 37/09
Of coated strip material
Official title: of coated strip material {; Making multi-wall tubes}
B21C37/09 (Of coated strip material) appears on 67 US grants and 65 published applications in this corpus.
Search patents in B21C- Granted patents
- 67
- Published applications
- 65
- Assignees
- 55
- Inventors
- 159
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 4 |
| 2003 | 1 | 2 |
| 2004 | 0 | 3 |
| 2005 | 1 | 6 |
| 2006 | 2 | 2 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 1 |
| 2011 | 1 | 3 |
| 2012 | 2 | 4 |
| 2013 | 0 | 2 |
| 2014 | 0 | 2 |
| 2015 | 3 | 5 |
| 2016 | 2 | 6 |
| 2017 | 1 | 0 |
| 2018 | 3 | 2 |
| 2019 | 4 | 1 |
| 2020 | 0 | 6 |
| 2021 | 2 | 2 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Amorphous inner-coated pipe and method for producing same29 Oct 2024US 12,129,955 B2Atometal Tech Pte. Ltd.
- Method for manufacturing clad steel pipe25 Jul 2023US 11,707,773 B2Baoshan Iron & Steel Co., Ltd.
- Methods of conducting coiled tubing operations29 Nov 2022US 11,512,539 B2Forum US, Inc.
- Gas tube for EGR cooler having improved anti-corrosive characteristics19 Oct 2021US 11,149,696 B2Korens Co., Ltd.
- Production method of electric resistance welded steel pipe and electric resistance welded steel pipe27 Aug 2026US 2026/0249378 A1Nippon Steel Corporation
- Corrosion resistant tube and method of manufacture11 Jan 2024US 2024/0011596 A1Indiana Tube Corporation
- Method for producing multi-walled tubes, and multiwalled tube7 Sep 2023US 2023/0278088 A1
- Finned tube and method of manufacturing the same6 Oct 2022US 2022/0316824 A1SchmöLe GmbH
- Amorphous inner-coated pipe and method for producing same22 Sep 2022US 2022/0299153 A1Attometal Tech Pte. Ltd.
Most cited
By later US patents
- Method of manufacturing brazable pipes and heat exchanger47US 4,945,635 AShowa Alumina Kabushiki Kaisha · 1990
- Method of forming seamed metal tube33US 5,474,227 AThe IDOD Trust · 1995
- Plastic-lined pipe20US 5,152,323 AAllied Tube & Conduit Corporation · 1992
- Method of forming seamed metal tube20US 5,344,062 AThe IDOD Trust · 1994
- Method of forming seamed metal tube19US 5,732,874 AThe IDOD Trust · 1998