C21D 9/62
With direct resistance heating
Official title: with direct resistance heating
C21D9/62 (With direct resistance heating) appears on 42 US grants and 24 published applications in this corpus.
Search patents in C21D- Granted patents
- 42
- Published applications
- 24
- Assignees
- 33
- Inventors
- 113
- Latest grant
- 17 Oct 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 2 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Hot-band annealing equipment, hot-band annealing method and descaling method for Si-containing hot rolled steel sheet17 Oct 2023US 11,788,165 B2Jfe Steel Corporation
- Apparatus and method for rapidly heating cold-rolled strip steel7 Jun 2022US 11,352,680 B2Baoshan Iron & Steel Co., Ltd.
- Method and device for reaction control24 May 2022US 11,339,450 B2Cockerill Maintenance & Ingenierie S.A.
- Method for the heat treatment of a steel reinforcement element for tires1 Jun 2021US 11,021,770 B2Compagnie Generale Des Etablissements Michelin
- Resistance annealing furnace to anneal a metal wire, strand, string, wire rod or strap19 Nov 2019US 10,480,044 B2Samp S.P.A. Con Unico Socio
- Method for annealing hot-rolled steel strip17 Jul 2025US 2025/0230519 A1Jfe Steel Corporation
- High performance thermal insulation of a heat treatment furnace for annealing a continuously moving strip22 May 2025US 2025/0163534 A1John Cockerill S.A.
- Heat- treated steel and heat treatment method for steel7 Nov 2024US 2024/0368718 A1Tokyo Rope Mfg. Co., Ltd.
- Wiredrawn product and method for manufacturing wiredrawn product6 Jun 2024US 2024/0183010 A1Tokyo Rope Mfg. Co., Ltd.
- Hot-band annealing equipment, hot-band annealing method and descaling method for si-containing hot rolled steel sheet3 Feb 2022US 2022/0033928 A1Jfe Steel Corporation
Most cited
By later US patents
- Patenting process and apparatus combined with a wire25US 4,043,170 A"December 4" Drotmuvek · 1977
- Method and apparatus of continuous dynamic joule heating to improve magnetic properties and to avoid annealing embrittlement of ferro-magnetic amorphous alloys15US 5,069,428 AChina Steel Corporation · 1991
- Apparatus for the manufacture of wire10US 3,962,898 ABerkenhoff & Drebes Gesellschaft mit beschrankter Haftung · 1976
- Wire heat treating apparatus10US 3,989,923 AInternational Standard Electric Corporation · 1976
- Grain-oriented electrical steel sheet with very low core loss and method of producing the same10US 5,833,768 ANippon Steel Corporation · 1998