B21C 37/30
Finishing tubes
Official title: Finishing tubes, e.g. sizing, burnishing
B21C37/30 (Finishing tubes) appears on 127 US grants and 84 published applications in this corpus.
Search patents in B21C- Granted patents
- 127
- Published applications
- 84
- Assignees
- 103
- Inventors
- 265
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 2 |
| 2002 | 7 | 6 |
| 2003 | 5 | 4 |
| 2004 | 4 | 4 |
| 2005 | 2 | 4 |
| 2006 | 1 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 4 |
| 2009 | 2 | 3 |
| 2010 | 1 | 4 |
| 2011 | 8 | 4 |
| 2012 | 2 | 4 |
| 2013 | 3 | 3 |
| 2014 | 2 | 2 |
| 2015 | 6 | 5 |
| 2016 | 7 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 4 |
| 2019 | 4 | 3 |
| 2020 | 2 | 4 |
| 2021 | 2 | 7 |
| 2022 | 4 | 4 |
| 2023 | 3 | 4 |
| 2024 | 4 | 1 |
| 2025 | 3 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for manufacturing metal pipe3 Feb 2026US 12,539,533 B2Nakata Manufacturing Co., Ltd.
- Electric resistance welded steel pipe and method for manufacturing the same16 Dec 2025US 12,498,059 B2Jfe Steel Corporation
- Steel material for a torsionally stressed component, method for producing a torsionally stressed component from said steel material, and component made thereof30 Sep 2025US 12,428,693 B2Mannesmann Precision Tubes GmbH
- Metallic tubular products with enhanced collapse resistance15 Jul 2025US 12,358,038 B2United States Steel Corporation
- Overlapping and progressive forming method for high-performance multi-element NiAl-based alloy tubular part24 Dec 2024US 12,172,203 B2Dalian University of Technology
- Electric resistance welded steel pipe or tube and production method therefor29 Jan 2026US 2026/0027641 A1Jfe Steel Corporation
- Integral forming method for large-size thin-walled ring shell31 Oct 2024US 2024/0359225 A1Dalian University of Technology
- Method for producing a brazing wire and resulting brazing wire17 Aug 2023US 2023/0256548 A1Sobracore
- Overlapping and progressive forming method for high-performance multi-element nial-based alloy tubular part15 Jun 2023US 2023/0182188 A1Dalian University of Technology
- Electric resistance welded steel pipe, method for manufacturing the same, and automotive structural member11 May 2023US 2023/0141285 A1Jfe Steel Corporation
Most cited
By later US patents
- Method for preparing the internal surface of pipe31US 5,460,563 A1995
- Method of increasing the fatigue life and/or reducing stress concentration cracking of coiled metal tubing30US 5,515,707 APrecision Tube Technology, Inc. · 1996
- Apparatus for calibrating and surfacing tubes27US 4,063,439 AChabas & Besson S.A. · 1977
- Press forming method23US 9,468,971 B2Nippon Steel & Sumitomo Metal Corporation · 2016
- Method of preparing a steel pipe, an apparatus thereof and a steel pipe22US 6,006,789 AKawasaki Steel Corporation · 1999