C21D 8/1244
Characterised by the heat treatment
Official title: characterised by the heat treatment
C21D8/1244 (Characterised by the heat treatment) appears on 893 US grants and 1,050 published applications in this corpus.
Search patents in C21D- Granted patents
- 893
- Published applications
- 1,050
- Assignees
- 170
- Inventors
- 1,373
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 9 | 0 |
| 1988 | 3 | 0 |
| 1989 | 9 | 0 |
| 1990 | 9 | 0 |
| 1991 | 13 | 0 |
| 1992 | 15 | 0 |
| 1993 | 15 | 0 |
| 1994 | 8 | 0 |
| 1995 | 11 | 0 |
| 1996 | 9 | 0 |
| 1997 | 16 | 0 |
| 1998 | 21 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 17 | 3 |
| 2002 | 19 | 18 |
| 2003 | 20 | 11 |
| 2004 | 11 | 11 |
| 2005 | 6 | 8 |
| 2006 | 4 | 6 |
| 2007 | 5 | 3 |
| 2008 | 8 | 6 |
| 2009 | 4 | 16 |
| 2010 | 5 | 9 |
| 2011 | 10 | 14 |
| 2012 | 11 | 18 |
| 2013 | 7 | 41 |
| 2014 | 6 | 29 |
| 2015 | 13 | 57 |
| 2016 | 21 | 42 |
| 2017 | 36 | 34 |
| 2018 | 30 | 50 |
| 2019 | 30 | 54 |
| 2020 | 33 | 55 |
| 2021 | 51 | 62 |
| 2022 | 53 | 126 |
| 2023 | 51 | 85 |
| 2024 | 75 | 102 |
| 2025 | 80 | 94 |
| 2026 | 53 | 96 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Annealing separator composition for grain- oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet6 Oct 2026US 12,753,457 B2Posco
- Non-oriented electrical steel sheet, method for producing same, and hot-rolled steel sheet22 Sep 2026US 12,742,223 B2Nippon Steel Corporation
- Wound core22 Sep 2026US 12,744,149 B2Nippon Steel Corporation
- Powder for annealing separator and method of producing same, and method of producing grain-oriented electrical steel sheet8 Sep 2026US 12,729,410 B2Jfe Steel Corporation
- Double-oriented electrical steel sheet, and method for producing same8 Sep 2026US 12,729,411 B2Posco
- Non-oriented electrical steel plate with high magnetic induction and manufacturing method thereof8 Oct 2026US 2026/0308707 A1Baoshan Iron & Steel Co., Ltd.
- Annealing method for hot-rolled steel strip, and method for producing electrical steel sheet using such annealing method24 Sep 2026US 2026/0286461 A1Jfe Steel Corporation
- Grain-oriented electrical steel sheet and method for forming insulating coating17 Sep 2026US 2026/0275442 A1Nippon Steel Corporation
- High-strength and low-iron-loss non-oriented electrical steel plate and manufacturing method therefor17 Sep 2026US 2026/0275466 A1Baoshan Iron & Steel Co., Ltd.
- Grain-oriented electrical steel sheet and manufacturing method of grain-oriented electrical steel sheet17 Sep 2026US 2026/0275467 A1Nippon Steel Corporation
Most cited
By later US patents
- Method for manufacturing single-oriented electrical steel sheets comprising antimony and having a high magnetic induction46US 3,932,234 AKawasaki Steel Corporation · 1976
- Bit allocation method for controlling transmission rate of video encoder41US 5,532,746 AKorea Telecommunication Authority · 1996
- Method for treating at least one part of soft magnetic material to form a hard wear area39US 5,769,965 ARobert Bosch GmbH · 1998
- Method of producing non-oriented silicon steel sheets having an excellent electromagnetic property38US 4,204,890 AKawasaki Steel Corporation · 1980
- High performance nanostructured materials and methods of making the same34US 6,596,101 B2The Johns Hopkins University · 2003