C21D 7/12
By expanding tubular bodies
Official title: by expanding tubular bodies
C21D7/12 (By expanding tubular bodies) appears on 94 US grants and 72 published applications in this corpus.
Search patents in C21D- Granted patents
- 94
- Published applications
- 72
- Assignees
- 74
- Inventors
- 230
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 4 |
| 2004 | 1 | 5 |
| 2005 | 3 | 4 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 3 | 2 |
| 2010 | 2 | 5 |
| 2011 | 3 | 7 |
| 2012 | 3 | 2 |
| 2013 | 7 | 0 |
| 2014 | 1 | 2 |
| 2015 | 2 | 4 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 3 | 8 |
| 2019 | 4 | 5 |
| 2020 | 3 | 1 |
| 2021 | 3 | 4 |
| 2022 | 2 | 3 |
| 2023 | 2 | 4 |
| 2024 | 2 | 2 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing a steel part and corresponding steel part28 Oct 2025US 12,454,744 B2ArcelorMittal
- Reinforced bulging tank of launch vehicle and manufacturing method therefor2 Sep 2025US 12,404,824 B2Guangnian Exploration (Jiangsu) Space Technology Co., Ltd
- Expanded tube for a motor vehicle crash box and manufacturing method for it19 Aug 2025US 12,391,201 B2Outokumpu Oyj
- Alloy5 Aug 2025US 12,378,648 B2Nippon Steel Corporation
- Steel material for line pipes, method for producing the same, and method for producing line pipe16 Jul 2024US 12,037,666 B2Jfe Steel Corporation
- Austenitic stainless steel material19 Jun 2025US 2025/0197982 A1Nippon Steel Corporation
- Reinforced bulging tank of launch vehicle and manufacturing method therefor16 May 2024US 2024/0159204 A1Light-year Explorer (Jiangsu) Space Technology Co., Ltd
- Steel pipe for pressure piping and starting material for steel pipe21 Mar 2024US 2024/0093324 A1Nippon Steel Corporation
- Multi-thickness welded vehicle structure15 Jun 2023US 2023/0183831 A1Multimatic Inc.
- Treatment process for a centrifugal compressor wheel to extend low-cycle fatigue life25 May 2023US 2023/0158618 A1Garrett Transportation I Inc.
Most cited
By later US patents
- Pipe expansion device113US 6,460,615 B1Shell Oil Company · 2002
- Tube expansion process77US 4,649,492 AWestinghouse Electric Corp. · 1987
- Fatigue life enhancement of dovetail connector slots and noncircular openings39US 4,885,829 AFatigue Technology, Inc. · 1989
- Split sleeve cold expansion36US 5,305,627 AFatigue Technology, Inc. · 1994
- Autofrettage of thermally clad components32US 10,215,172 B2Weir Group IP Limited · 2019