C21D 9/0081
Heat treatment: for slabs
Official title: {for slabs; for billets}
C21D9/0081 (Heat treatment: for slabs) appears on 214 US grants and 195 published applications in this corpus.
Search patents in C21D- Granted patents
- 214
- Published applications
- 195
- Assignees
- 172
- Inventors
- 763
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 9 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 10 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 2 |
| 2002 | 0 | 0 |
| 2003 | 2 | 3 |
| 2004 | 4 | 5 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 1 | 3 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 3 |
| 2012 | 0 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 2 | 9 |
| 2016 | 3 | 11 |
| 2017 | 2 | 16 |
| 2018 | 5 | 3 |
| 2019 | 10 | 7 |
| 2020 | 4 | 15 |
| 2021 | 5 | 16 |
| 2022 | 14 | 14 |
| 2023 | 8 | 27 |
| 2024 | 9 | 11 |
| 2025 | 18 | 24 |
| 2026 | 10 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low alloy third generation advanced high strength steel and process for making28 Jul 2026US 12,692,584 B2Cleveland-Cliffs Inc.
- High strength thin steel material for API having excellent resistance to deformation and method of manufacturing same21 Jul 2026US 12,686,898 B2Posco
- Aluminum plated steel sheet, thermoformed component, and manufacturing methods7 Jul 2026US 12,674,227 B2Baoshan Iron & Steel Co., Ltd.
- Device for heating steel products9 Jun 2026US 12,649,956 B2Danieli & C. Officine Meccaniche SpA
- Steel with controlled yield ratio and manufacturing method therefor5 May 2026US 12,618,129 B2Baoshan Iron & Steel Co., Ltd.
- Shaped Sheet-Metal Part with Improved Welding Properties17 Sep 2026US 2026/0275483 A1ThyssenKrupp Steel Europe AG
- Method of heating a steel semi-product in a heating furnace, and associated heating furnace3 Sep 2026US 2026/0259005 A1
- Low-thermal-expansion alloy20 Aug 2026US 2026/0242897 A1Shinhokoku Material Corp.
- Continuously cast slab and manufacturing method therefor13 Aug 2026US 2026/0233295 A1Jfe Steel Corporation
- Ferritic stainless steel with improved impact toughness, and manufacturing method thereof23 Jul 2026US 2026/0209919 A1Posco
Most cited
By later US patents
- Furnace for heating slabs, billets, rough castings and the like34US 4,421,481 ADidier Engineering GmbH · 1983
- Method and apparatus for continuous casting and hot-rolling32US 5,461,770 AHitachi, Ltd. · 1995
- Method for controlling furnace temperature of multi-zone heating furnace31US 4,255,133 AHitachi, Ltd. · 1981
- Method of controlling the temperature of a heating furnace21US 4,373,364 AHitachi, Ltd. · 1983
- Method and apparatus for continuously hot rolling strip20US 5,490,315 AItalimpianti of America, Inc. · 1996