C21D 8/02
During manufacturing of plates or strips
Official title: during manufacturing of plates or strips (C21D8/12 takes precedence)
C21D8/02 (During manufacturing of plates or strips) appears on 3,580 US grants and 5,028 published applications in this corpus.
Search patents in C21D- Granted patents
- 3,580
- Published applications
- 5,028
- Assignees
- 714
- Inventors
- 6,749
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 22 | 0 |
| 1978 | 20 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 7 | 0 |
| 1982 | 13 | 0 |
| 1983 | 23 | 0 |
| 1984 | 13 | 0 |
| 1985 | 19 | 0 |
| 1986 | 19 | 0 |
| 1987 | 9 | 0 |
| 1988 | 12 | 0 |
| 1989 | 17 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 17 | 0 |
| 1993 | 14 | 0 |
| 1994 | 23 | 0 |
| 1995 | 22 | 0 |
| 1996 | 31 | 0 |
| 1997 | 21 | 0 |
| 1998 | 38 | 0 |
| 1999 | 27 | 0 |
| 2000 | 40 | 0 |
| 2001 | 54 | 17 |
| 2002 | 37 | 61 |
| 2003 | 68 | 68 |
| 2004 | 58 | 87 |
| 2005 | 27 | 43 |
| 2006 | 19 | 46 |
| 2007 | 13 | 47 |
| 2008 | 21 | 55 |
| 2009 | 29 | 93 |
| 2010 | 36 | 126 |
| 2011 | 60 | 111 |
| 2012 | 47 | 109 |
| 2013 | 57 | 181 |
| 2014 | 86 | 215 |
| 2015 | 113 | 248 |
| 2016 | 91 | 236 |
| 2017 | 177 | 253 |
| 2018 | 161 | 263 |
| 2019 | 217 | 311 |
| 2020 | 203 | 349 |
| 2021 | 219 | 302 |
| 2022 | 291 | 398 |
| 2023 | 201 | 399 |
| 2024 | 250 | 394 |
| 2025 | 328 | 307 |
| 2026 | 246 | 309 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C21D 8/0221Characterised by the working steps2,435
- C21D 8/0247Characterised by the heat treatment2,082
- C21D 8/04To produce plates or strips for drawing778
- C21D 8/0278Involving a particular surface treatment545
- C21D 8/021Involving particular fabrication steps or treatments of ingots or slabs274
- C21D 8/0294Involving a localised treatment40
Recent patents
- High strength steel sheet and method of producing same6 Oct 2026US 12,753,454 B2Jfe Steel Corporation
- 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
- A cold rolled martensitic steel and a method of martensitic steel thereof8 Oct 2026US 2026/0308706 A1
- Steel plate and method for manufacturing same8 Oct 2026US 2026/0308708 A1Posco
- 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.
- System and method to produce rolled green steel products with very low ghg emission intensity1 Oct 2026US 2026/0297701 A1Saarloha Advanced Materials Private Limited
Most cited
By later US patents
- Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment151US 6,296,805 B1Sollac · 2001
- Tear resistant gelatinous elastomer compositions and articles for use as fishing bait86US 6,794,440 B2Applied Elastomerics, Inc. · 2004
- Steel plate having superior toughness in weld heat-affected zone and welded structure made therefrom84US 7,105,066 B2Posco · 2006
- 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