F27B 5/04
Muffle furnaces: adapted for treating the charge in vacuum or special atmosphere
Official title: adapted for treating the charge in vacuum or special atmosphere
F27B5/04 (Muffle furnaces: adapted for treating the charge in vacuum or special atmosphere) appears on 236 US grants and 278 published applications in this corpus.
Search patents in F27B- Granted patents
- 236
- Published applications
- 278
- Assignees
- 194
- Inventors
- 682
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 5 |
| 2003 | 2 | 6 |
| 2004 | 6 | 9 |
| 2005 | 2 | 8 |
| 2006 | 11 | 28 |
| 2007 | 5 | 23 |
| 2008 | 12 | 8 |
| 2009 | 5 | 6 |
| 2010 | 19 | 20 |
| 2011 | 8 | 10 |
| 2012 | 9 | 4 |
| 2013 | 6 | 14 |
| 2014 | 6 | 15 |
| 2015 | 5 | 10 |
| 2016 | 9 | 11 |
| 2017 | 13 | 15 |
| 2018 | 4 | 11 |
| 2019 | 13 | 6 |
| 2020 | 12 | 10 |
| 2021 | 4 | 16 |
| 2022 | 9 | 8 |
| 2023 | 7 | 8 |
| 2024 | 9 | 10 |
| 2025 | 4 | 11 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Furnace system and method of use24 Mar 2026US 12,584,691 B2Mantle Inc.
- Vacuum oven17 Feb 2026US 12,553,665 B12422353 Ontario Limited
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- Vacuum carburizing furnace and vacuum carburizing treatment method21 May 2026US 2026/0139353 A1Dowa Thermotech Co., Ltd.
- Telescoping Ram and Methods for Its Use in Transferring Solid Material21 May 2026US 2026/0139904 A1Gti Energy
- Efficient induction heating tube furnace16 Apr 2026US 2026/0104206 A1
- Low-cost high-purity vacuum pumps and systems12 Mar 2026US 2026/0071820 A1Desktop Metal, Inc.
Most cited
By later US patents
- Substrate heat treatment apparatus491US 7,432,476 B2Dainippon Screen Mfg.Co., Ltd. · 2008
- Heater for hot isostatic pressing apparatus63US 4,503,319 AKabushiki Kaisha Kobe Seiko Sho · 1985
- Method and apparatus for low temperature pyrometry useful for thermally processing silicon wafers48US 7,112,763 B2APPLIED Materials.Inc. · 2006
- Curing systems for materials that consume carbon dioxide and method of use thereof42US 9,221,027 B2Solidia Technologies, Inc. · 2015
- Flux-free soldering of aluminum-containing workpieces in a controlled atmosphere39US 3,982,887 AVereinigte Aluminium-Werke Aktiengesellschaft · 1976