F27B 9/185
Multiple hearth type furnaces
Official title: {multiple hearth type furnaces}
F27B9/185 (Multiple hearth type furnaces) appears on 32 US grants and 13 published applications in this corpus.
Search patents in F27B- Granted patents
- 32
- Published applications
- 13
- Assignees
- 21
- Inventors
- 59
- Latest grant
- 6 Apr 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 2 | 3 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Roasting furnace, use thereof and method for the processing of ores or concentrates6 Apr 2021US 10,969,174 B2Sadaci NV
- Molecular pyrodisaggregator26 Jan 2021US 10,899,967 B2
- Modular furnace1 Dec 2020US 10,852,063 B2Img-Na, LLC
- Multiple hearth furnace improvements21 Jul 2020US 10,718,567 B2Synergetics Pty. Ltd.
- Apparatus and methods for producing direct reduced iron25 Aug 2015US 9,115,413 B2
- Roasting furnace, use thereof and method for the processing of ores or concentrates16 May 2019US 2019/0145707 A1Sadaci NV
- Modular Furnace6 Dec 2018US 2018/0347904 A1Img-Na, LLC
- Multiple hearth furnace improvements8 Dec 2016US 2016/0356548 A1Synergetics Pty. Ltd.
- Molecular pyrodisaggregator3 Nov 2016US 2016/0319196 A1
- Apparatus and methods for producing direct reduced iron27 Dec 2012US 2012/0325053 A1
Most cited
By later US patents
- Reducing hydrogen concentration in pecvd amorphous silicon carbide films26US 5,800,878 AAPPLIED Materials.Inc. · 1998
- System for controlling the operation of a multiple hearth furnace25US 3,958,920 AThe Rust Engineering Company · 1976
- Oven heating system20US 4,514,167 ASantrade Ltd. · 1985
- Furnace with modular construction13US 4,702,694 AUnion Oil Company of California · 1987
- Mixed frequency RF generator coupled to the gas distribution system12US 6,668,752 B2APPLIED Materials.Inc. · 2003