F27B 5/02
Muffle furnaces: of multiple-chamber type
Official title: of multiple-chamber type
F27B5/02 (Muffle furnaces: of multiple-chamber type) appears on 20 US grants and 34 published applications in this corpus.
Search patents in F27B- Granted patents
- 20
- Published applications
- 34
- Assignees
- 26
- Inventors
- 91
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 5 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 6 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 0 | 8 |
| 2022 | 3 | 2 |
| 2023 | 4 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Cantilever diffusion tube apparatus and method48US 4,526,534 AQuartz Engineering & Materials, Inc. · 1985
- Slotted cantilever diffusion tube system and method and apparatus for loading45US 4,543,059 AQuartz Engineering & Materials, Inc. · 1985
- Cantilever diffusion tube apparatus and method26US 4,459,104 AQuartz Engineering & Materials, Inc. · 1984
- Thermal treatment apparatus24US 4,468,195 AHitachi, Ltd. · 1984
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