C21D 8/0247
Characterised by the heat treatment
Official title: characterised by the heat treatment
C21D8/0247 (Characterised by the heat treatment) appears on 2,082 US grants and 3,316 published applications in this corpus.
Search patents in C21D- Granted patents
- 2,082
- Published applications
- 3,316
- Assignees
- 419
- Inventors
- 4,270
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 8 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 16 | 3 |
| 2002 | 16 | 32 |
| 2003 | 29 | 32 |
| 2004 | 30 | 39 |
| 2005 | 10 | 19 |
| 2006 | 9 | 18 |
| 2007 | 2 | 10 |
| 2008 | 4 | 13 |
| 2009 | 11 | 33 |
| 2010 | 10 | 42 |
| 2011 | 24 | 39 |
| 2012 | 17 | 44 |
| 2013 | 19 | 93 |
| 2014 | 28 | 153 |
| 2015 | 57 | 173 |
| 2016 | 50 | 178 |
| 2017 | 123 | 185 |
| 2018 | 114 | 181 |
| 2019 | 160 | 225 |
| 2020 | 148 | 203 |
| 2021 | 158 | 188 |
| 2022 | 182 | 278 |
| 2023 | 131 | 316 |
| 2024 | 170 | 322 |
| 2025 | 256 | 246 |
| 2026 | 189 | 251 |
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
- Steel sheet with excellent phosphatability and manufacturing method therefor6 Oct 2026US 12,753,458 B2Posco
- Hot rolled high strength steel strip having high hole expansion ratio6 Oct 2026US 12,753,461 B2Tata Steel Ijmuiden B.V.
- Method of manufacturing grain-oriented electrical steel sheet and hot-rolled steel sheet for grain-oriented electrical steel sheet6 Oct 2026US 12,753,471 B2Jfe Steel Corporation
- High-strength alloyed hot-dip galvanized steel sheet and manufacturing method therefor6 Oct 2026US 12,753,477 B2Kobe Steel, Ltd.
- A cold rolled martensitic steel and a method of martensitic steel thereof8 Oct 2026US 2026/0308706 A1
- Martensitic stainless steel strip8 Oct 2026US 2026/0308709 A1Proterial, Ltd.
- Hydrogen induced cracking-resistant cold-rolled hot-dip galvanized ultra-high-strength dual-phase steel and manufacturing method therefor8 Oct 2026US 2026/0308732 A1Baoshan Iron & Steel Co., Ltd.
- High strength steel sheet, high strength coated steel sheet, methods for producing the same, and member1 Oct 2026US 2026/0297712 A1Jfe Steel Corporation
- Coated steel sheet, member, and methods for producing the same1 Oct 2026US 2026/0297713 A1Jfe Steel Corporation
Most cited
By later US patents
- High strength steel sheet having excellent formability and method for production thereof66US 7,090,731 B2Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) · 2006
- High toughness low yield ratio, high fatigue strength steel plate and process of producing same65US 5,454,883 ANippon Steel Corporation · 1995
- Flat product, such as sheet, made of steel having a high yield strength and exhibiting good ductility and process for manufacturing this product53US 6,395,108 B2Recherche et Developpement du Groupe Cockerill Sambre · 2002
- Method for producing a steel sheet with dual-phase structure composed of ferrite- and rapidly-cooled-transformed phases39US 4,062,700 ANippon Steel Corporation · 1977
- Oxidation resistant high-entropy alloys33US 10,190,197 B2Trustees of Dartmouth College · 2019