F27B 5/00
Muffle furnaces
Official title: Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (furnaces through which the charge is moved mechanically or in which the charge moves by gravity F27B9/00)
F27B5/00 (Muffle furnaces) appears on 526 US grants and 529 published applications in this corpus.
Search patents in F27B- Granted patents
- 526
- Published applications
- 529
- Assignees
- 364
- Inventors
- 1,318
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 11 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 14 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 13 | 0 |
| 1990 | 10 | 0 |
| 1991 | 7 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 5 | 9 |
| 2003 | 5 | 10 |
| 2004 | 10 | 14 |
| 2005 | 6 | 11 |
| 2006 | 15 | 30 |
| 2007 | 8 | 32 |
| 2008 | 13 | 11 |
| 2009 | 10 | 9 |
| 2010 | 21 | 25 |
| 2011 | 8 | 19 |
| 2012 | 12 | 15 |
| 2013 | 12 | 31 |
| 2014 | 14 | 32 |
| 2015 | 17 | 22 |
| 2016 | 21 | 29 |
| 2017 | 28 | 30 |
| 2018 | 14 | 21 |
| 2019 | 24 | 24 |
| 2020 | 24 | 28 |
| 2021 | 18 | 30 |
| 2022 | 24 | 22 |
| 2023 | 20 | 15 |
| 2024 | 20 | 24 |
| 2025 | 16 | 24 |
| 2026 | 8 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electrode ovens and electrode heating and drying methods15 Sep 2026US 12,736,286 B1Henkel Enterprises, LLC
- Internal data acquisition device for vacuum furnace11 Aug 2026US 12,704,417 B2Fluke Corporation
- Heat treatment device and method of manufacturing display panel using the same28 Jul 2026US 12,693,074 B2Samsung Display Co., Ltd.
- Apparatus comprising a removable tool for infiltration in the gas phase9 Jun 2026US 12,652,990 B2Safran Ceramics
- Processing method and processing apparatus for metal component19 May 2026US 12,630,914 B2Parker Netsushori Kogyo K.K.
- Apparatus and method for heat treatment of wood24 Sep 2026US 2026/0286227 A1
- Kilns with pyrometric cone-activated control switches24 Sep 2026US 2026/0287257 A1
- Sintering furnace23 Jul 2026US 2026/0210633 A1Seco Tools AB
- Furnace atmosphere control device and method2 Jul 2026US 2026/0185775 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- Vacuum carburizing furnace and vacuum carburizing treatment method21 May 2026US 2026/0139353 A1Dowa Thermotech Co., Ltd.
Most cited
By later US patents
- Substrate heat treatment apparatus491US 7,432,476 B2Dainippon Screen Mfg.Co., Ltd. · 2008
- Forced cooling apparatus for heat treatment apparatus370US 5,249,960 ATokyo Electron Sagami Limited · 1993
- Apparatus for heat treating substrates capable of quick cooling354US 4,925,388 ADainippon Screen Mfg.Co., Ltd. · 1990
- Curing oven for magazine holding computer chip lead frames, providing flow direction control for hot gas stream349US 5,569,402 AEsec AG · 1996
- Hot wall rapid thermal processor293US 6,462,310 B1ASML US, Inc. · 2002