C21D 8/021
Involving particular fabrication steps or treatments of ingots or slabs
Official title: involving particular fabrication steps or treatments of ingots or slabs
C21D8/021 (Involving particular fabrication steps or treatments of ingots or slabs) appears on 274 US grants and 412 published applications in this corpus.
Search patents in C21D- Granted patents
- 274
- Published applications
- 412
- Assignees
- 125
- Inventors
- 975
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 8 |
| 2003 | 11 | 7 |
| 2004 | 5 | 10 |
| 2005 | 4 | 5 |
| 2006 | 2 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 7 |
| 2009 | 1 | 8 |
| 2010 | 2 | 13 |
| 2011 | 3 | 8 |
| 2012 | 6 | 7 |
| 2013 | 4 | 8 |
| 2014 | 5 | 8 |
| 2015 | 5 | 19 |
| 2016 | 5 | 17 |
| 2017 | 12 | 15 |
| 2018 | 9 | 6 |
| 2019 | 15 | 18 |
| 2020 | 11 | 26 |
| 2021 | 12 | 21 |
| 2022 | 23 | 37 |
| 2023 | 13 | 46 |
| 2024 | 18 | 38 |
| 2025 | 37 | 44 |
| 2026 | 32 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ultra-high strength cold rolled steel sheet having excellent bendability, and method of manufacturing same6 Oct 2026US 12,753,455 B2Posco
- Hot-rolled steel sheet15 Sep 2026US 12,735,778 B2Nippon Steel Corporation
- Zinc or zinc-alloy coated strip or steel with improved zinc adhesion15 Sep 2026US 12,735,780 B2voestalpine Stahl GmbH
- Hot-rolled steel sheet16 Jun 2026US 12,655,494 B2Nippon Steel Corporation
- Low density hot rolled steel, method of production thereof and use of such steel to produce vehicle parts16 Jun 2026US 12,655,497 B2ArcelorMittal
- Steel sheet and plated steel sheet1 Oct 2026US 2026/0297714 A1Nippon Steel Corporation
- Highly formable and easily phosphated high-manganese cold-rolled steel plate having tensile strength of 1000-1600 mpa, and manufacturing method therefor24 Sep 2026US 2026/0286455 A1Baoshan Iron & Steel Co., Ltd.
- Steel sheet and method of production of same17 Sep 2026US 2026/0275470 A1Nippon Steel Corporation
- Steel sheet10 Sep 2026US 2026/0265883 A1Nippon Steel Corporation
- Steel sheet and high strength press hardened steel part having excellent bending anisotropy and method of manufacturing the same20 Aug 2026US 2026/0242906 A1
Most cited
By later US patents
- Steel plate having superior toughness in weld heat-affected zone and welded structure made therefrom84US 7,105,066 B2Posco · 2006
- Method for producing titanium-bearing microalloyed high-strength low-alloy steel34US 6,669,789 B1Nucor Corporation · 2003
- Process and plant for obtaining steel strip coils having cold-rolled characteristics and directly obtained in a hot-rolling line32US 5,329,688 AHoogovens Groep B.V. · 1994
- Method and plant for rolling hot-rolled wide strip in a CSP plant32US 6,030,470 ASMS Schloemann-Siemag Aktiengesellschaft · 2000
- Apparatus for producing strip of stainless steel31US 5,904,204 ANippon Steel Corporation · 1999