C21D 1/02
Hardening articles or materials formed by forging or rolling, with no further
Official title: Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
C21D1/02 (Hardening articles or materials formed by forging or rolling, with no further) appears on 180 US grants and 285 published applications in this corpus.
Search patents in C21D- Granted patents
- 180
- Published applications
- 285
- Assignees
- 102
- Inventors
- 682
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 0 |
| 2003 | 0 | 1 |
| 2004 | 3 | 6 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 1 | 2 |
| 2008 | 1 | 4 |
| 2009 | 2 | 4 |
| 2010 | 2 | 5 |
| 2011 | 1 | 1 |
| 2012 | 3 | 3 |
| 2013 | 3 | 1 |
| 2014 | 3 | 5 |
| 2015 | 1 | 4 |
| 2016 | 2 | 3 |
| 2017 | 4 | 4 |
| 2018 | 2 | 5 |
| 2019 | 1 | 6 |
| 2020 | 3 | 7 |
| 2021 | 2 | 14 |
| 2022 | 13 | 51 |
| 2023 | 5 | 60 |
| 2024 | 19 | 37 |
| 2025 | 38 | 28 |
| 2026 | 26 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hot-rolled steel sheet for non-oriented electromagnetic steel sheets25 Aug 2026US 12,716,120 B2Nippon Steel Corporation
- Non-quenched and tempered round steel with high strength, high toughness and easy cutting and manufacturing method therefor16 Jun 2026US 12,655,508 B2Baoshan Iron & Steel Co., Ltd.
- Method for producing a dual-phase steel strip in a combined casting and rolling system, a dual-phase steel strip produced by means of the method, and a combined casting and rolling system19 May 2026US 12,629,747 B2Primetals Technologies Austria GmbH
- Steel sheet and manufacturing method thereof12 May 2026US 12,624,412 B2Nippon Steel Corporation
- Steel plate having high strength and excellent impact toughness after deformation, and method for manufacturing same28 Apr 2026US 12,612,674 B2Posco
- High strength steel plate for hydrogen transport steel pipe, method for manufacturing high strength steel plate, and steel pipe for transporting hydrogen27 Aug 2026US 2026/0250816 A1Jfe Steel Corporation
- Stainless steel clad plate with excellent shape and preparation method thereof20 Aug 2026US 2026/0241428 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- Rail and method of producing same20 Aug 2026US 2026/0242910 A1Jfe Steel Corporation
- Continuously cast slab and manufacturing method therefor13 Aug 2026US 2026/0233295 A1Jfe Steel Corporation
- High-strength steel plate for hydrogen transporting steel pipe, production method therefor, and hydrogen transporting steel pipe13 Aug 2026US 2026/0234742 A1Jfe Steel Corporation
Most cited
By later US patents
- Warm forming high strength steel parts42US 5,538,566 AConsolidated Metal Products, Inc. · 1996
- Producing rolled steel products23US 4,016,009 ACentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie · 1977
- Thermal process for selectively hardening track chain links21US 5,759,309 ACaterpillar Inc. · 1998
- Ultra-high strength triple phase steels with excellent cryogenic temperature toughness21US 6,159,312 AExxonMobil Upstream Research Company · 2000
- Cutting members for shaving razors20US 8,499,462 B2The Gillette Company · 2013