C21D 9/667
Multi-station furnaces
C21D9/667 (Multi-station furnaces) appears on 37 US grants and 17 published applications in this corpus.
Search patents in C21D- Granted patents
- 37
- Published applications
- 17
- Assignees
- 25
- Inventors
- 71
- Latest grant
- 1 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 3 |
| 2013 | 0 | 1 |
| 2014 | 2 | 3 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- System for and method of processing waste lithium-ion battery1 Apr 2025US 12,266,770 B2Kawasaki Jukogyo Kabushiki Kaisha
- Arrangement having plural temperature-control stations for heat treating component parts, and their handling9 May 2023US 11,644,239 B2EBNER Industrieofenbau GmbH
- Zinc-coated steel for press hardening applications and method of production21 Jul 2020US 10,718,045 B2AK Steel Properties, Inc.
- Heat treatment method23 Aug 2016US 9,423,183 B2Mitsubishi Heavy Industries, Ltd.
- Dual-purpose facility of continuous hot-dip coating and continuous annealing8 Sep 2015US 9,127,339 B2Nippon Steel & Sumitomo Metal Corporation
- Motor core production method and heat treatment device used therefor27 Jul 2023US 2023/0235422 A1Daido Steel Co., Ltd.
- System for and method of processing waste lithium-ion battery5 May 2022US 2022/0140412 A1Kawasaki Jukogyo Kabushiki Kaisha
- Arrangement having plural temperature-control stations for heat treating component parts, and their handling11 Mar 2021US 2021/0071955 A1EBNER Industrieofenbau GmbH
- Surface modification of stainless steels10 May 2018US 2018/0127850 A1
- Heat treatment method15 Jan 2015US 2015/0017593 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Method and apparatus for batch coil annealing metal strip8US 5,380,378 AGas Research Institute · 1995
- Annealing furnace system7US 4,480,822 A1984
- Dual-purpose facility of continuous hot-dip coating and continuous annealing6US 8,714,104 B2Nippon Steel & Sumitomo Metal Corporation · 2014
- Dual-purpose facility of continuous hot-dip coating and continuous annealing6US 9,127,339 B2Nippon Steel & Sumitomo Metal Corporation · 2015
- Method and apparatus for effecting uniform heat transfer in an industrial furnace5US 4,142,712 AMidland-Ross Corporation · 1979