C21D 8/1233
Cold rolling
Official title: {Cold rolling}
C21D8/1233 (Cold rolling) appears on 553 US grants and 723 published applications in this corpus.
Search patents in C21D- Granted patents
- 553
- Published applications
- 723
- Assignees
- 103
- Inventors
- 892
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 1 | 0 |
| 1993 | 8 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 0 |
| 2002 | 8 | 9 |
| 2003 | 15 | 11 |
| 2004 | 8 | 8 |
| 2005 | 4 | 7 |
| 2006 | 3 | 1 |
| 2007 | 4 | 2 |
| 2008 | 4 | 1 |
| 2009 | 0 | 1 |
| 2010 | 3 | 4 |
| 2011 | 1 | 7 |
| 2012 | 4 | 8 |
| 2013 | 2 | 16 |
| 2014 | 6 | 22 |
| 2015 | 6 | 34 |
| 2016 | 6 | 19 |
| 2017 | 29 | 27 |
| 2018 | 15 | 28 |
| 2019 | 18 | 33 |
| 2020 | 18 | 43 |
| 2021 | 40 | 54 |
| 2022 | 42 | 96 |
| 2023 | 41 | 57 |
| 2024 | 53 | 74 |
| 2025 | 62 | 79 |
| 2026 | 37 | 82 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Method for manufacturing grain-oriented electrical steel sheet8 Sep 2026US 12,729,412 B2Jfe Steel Corporation
- Non-oriented electrical steel sheet and method for manufacturing same8 Sep 2026US 12,729,418 B2Posco
- Method for producing grain-oriented electrical steel sheet1 Sep 2026US 12,723,288 B2Nippon Steel Corporation
- 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
- High performance nanostructured materials and methods of making the same34US 6,596,101 B2The Johns Hopkins University · 2003
- Method of producing grain-oriented magnetic steel sheet27US 5,885,371 AKawasaki Steel Corporation · 1999
- Process for producing nonoriented silicon sheet steel having excellent magnetic properties in the rolling direction26US 4,046,602 AUnited States Steel Corporation · 1977
- Composition, processing and devices including magnetic alloy25US 4,075,437 ABell Telephone Laboratories, Incorporated · 1978