B21B 1/088
H- or i-sections
Official title: H- or I-sections
B21B1/088 (H- or i-sections) appears on 90 US grants and 39 published applications in this corpus.
Search patents in B21B- Granted patents
- 90
- Published applications
- 39
- Assignees
- 42
- Inventors
- 217
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 9 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 4 |
| 2016 | 2 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 4 |
| 2019 | 1 | 6 |
| 2020 | 3 | 7 |
| 2021 | 1 | 3 |
| 2022 | 2 | 0 |
| 2023 | 2 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Hot-rolled, low-temperature-resistant, H-shaped steel with grade of yield strength of 420 MPa and preparation method therefor23 Dec 2025US 12,503,738 B2Shandong Iron and Steel Company Ltd.
- Extra thick hot rolled h section steel and production method therefor22 Apr 2025US 12,281,369 B2Maanshan Iron & Steel Co., Ltd.
- Steel section rolling mill15 Aug 2023US 11,724,295 B2ArcelorMittal
- Bending method25 Jul 2023US 11,707,774 B2Aisin Keikinzoku Kabushiki Kaisha
- Method for producing H-shaped steel21 Jun 2022US 11,364,524 B2Nippon Steel Corporation
- Hot-rolled, low-temperature-resistant, h-shaped steel with grade of yield strength of 420 mpa and preparation method therefor20 Mar 2025US 2025/0092480 A1Shandong Iron and Steel Company Ltd.
- Method for manufacturing a monolithic component13 Mar 2025US 2025/0083835 A1
- Extra thick hot rolled h section steel and production method therefor4 Apr 2024US 2024/0110255 A1Maanshan Iron & Steel Co., Ltd.
- Method for producing h-shaped steel2 Dec 2021US 2021/0370370 A1Nippon Steel & Sumitomo Metal Corporation
- Bending method23 Sep 2021US 2021/0291247 A1Aisin Keikinzoku Kabushiki Kaisha
Most cited
By later US patents
- Method and apparatus for molten salt electroplating of steel16US 4,895,633 AMitsubishi Jukogyo Kabushiki Kaisha · 1990
- Adjustable width rolls for rolling mill14US 5,031,435 AKawasaki Steel Corporation · 1991
- Method and apparatus for rolling metallic material12US 4,106,318 ANippon Steel Corporation · 1978
- Structrual-shape steel rolling mill and method of operating same12US 4,791,799 ASMS Schloemann-Siemag Aktiengesellschaft · 1988
- H-shape metallic material rolling process11US 4,086,801 ANippon Steel Corporation · 1978