C21D 9/0062
Heat-treating apparatus with a cooling or quenching zone
Official title: {Heat-treating apparatus with a cooling or quenching zone}
C21D9/0062 (Heat-treating apparatus with a cooling or quenching zone) appears on 194 US grants and 261 published applications in this corpus.
Search patents in C21D- Granted patents
- 194
- Published applications
- 261
- Assignees
- 172
- Inventors
- 640
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 4 |
| 2005 | 1 | 3 |
| 2006 | 4 | 3 |
| 2007 | 0 | 1 |
| 2008 | 3 | 3 |
| 2009 | 3 | 4 |
| 2010 | 1 | 2 |
| 2011 | 2 | 3 |
| 2012 | 2 | 10 |
| 2013 | 3 | 10 |
| 2014 | 3 | 12 |
| 2015 | 6 | 16 |
| 2016 | 8 | 19 |
| 2017 | 13 | 22 |
| 2018 | 5 | 9 |
| 2019 | 17 | 17 |
| 2020 | 10 | 20 |
| 2021 | 8 | 15 |
| 2022 | 20 | 14 |
| 2023 | 14 | 14 |
| 2024 | 3 | 24 |
| 2025 | 11 | 18 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Thermal processing of closed shape workpieces28 Jul 2026US 12,692,568 B2Beijing E-Town Semiconductor Technology Co., Ltd.
- Motor core production method and heat treatment device used therefor7 Jul 2026US 12,674,217 B2Daido Steel Co., Ltd.
- Thermal treatment of component30 Jun 2026US 12,668,851 B2Schwartz GmbH
- High strength steel for structure with excellent corrosion resistance and manufacturing method for same16 Jun 2026US 12,655,491 B2Posco
- Method and device for rapidly cooling a metal strip and continuous production line for metal strips1 Oct 2026US 2026/0297700 A1Fives Stein
- Temperature-control device1 Oct 2026US 2026/0297702 A1EBNER Industrieofenbau GmbH
- Quenching apparatus30 Jul 2026US 2026/0218324 A1Aisin Corporation
- Quenching apparatus30 Jul 2026US 2026/0218327 A1Aisin Corporation
- Thermally Treating a Metallic Component16 Jul 2026US 2026/0201489 A1
Most cited
By later US patents
- Continuous type atmosphere heat treating furnace38US 4,627,814 AChugai Ro Co., Ltd. · 1986
- Method and apparatus for chemical heat treatment of steel parts utilizing a continuous electric furnace26US 4,455,177 A1984
- Process and apparatus for thermochemically hardening workpieces22US 10,626,490 B2ALD Vacuum Technologies GmbH · 2020
- Multi-chamber vacuum furnace for heat-treating metal articles22US 4,653,732 AAichelin GmbH · 1987
- Heat-treating apparatus21US 5,273,585 AMazda Motor Corporation · 1993