F27B 7/02
Rotary-drum furnaces, i.e. horizontal or slightly inclined: of multiple-chamber or multiple-drum type
Official title: of multiple-chamber or multiple-drum type
F27B7/02 (Rotary-drum furnaces, i.e. horizontal or slightly inclined: of multiple-chamber or multiple-drum type) appears on 52 US grants and 38 published applications in this corpus.
Search patents in F27B- Granted patents
- 52
- Published applications
- 38
- Assignees
- 67
- Inventors
- 158
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 4 |
| 2017 | 3 | 2 |
| 2018 | 4 | 2 |
| 2019 | 2 | 1 |
| 2020 | 0 | 5 |
| 2021 | 1 | 2 |
| 2022 | 2 | 1 |
| 2023 | 3 | 3 |
| 2024 | 0 | 1 |
| 2025 | 2 | 3 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Deployable multi-zone rotary-kiln system and method for recovery of gallium oxide from electronic waste15 Sep 2026US 12,735,769 B1Simple Approach Systems, Inc.
- Method for manufacturing ceramic product containing silicon carbide17 Feb 2026US 12,553,667 B2NGK Insulators, Ltd.
- Tube module and tube assembly including same28 Oct 2025US 12,455,116 B2LG Energy Solution, Ltd.
- Method of forming positive electrode active material, kiln, and heating furnace19 Aug 2025US 12,392,555 B2Semiconductor Energy Laboratory Co.Ltd.
- Apparatus and method of producing activated carbon material22 Aug 2023US 11,731,879 B2ByGen PTY LTD
- Installation for thermal degradation of composite materials and associated method for recycling same16 Jul 2026US 2026/0199942 A1Acciona ConstruccióN, S.A.
- Method and system for pyrolytic recycling of mobile phone circuit boards18 Jun 2026US 2026/0166604 A1Guangzhou Aifengpai Environmental Protection Technology Co., Ltd.
- Device for haremless treatment of phosphogypsum by calcination using high-temperature ceramsite29 Jan 2026US 2026/0029199 A1Hubei Juhai Environmental Technology Co., Ltd.
- Heat recovery system for kiln and method for recovering heat from solids processed in a kiln27 Nov 2025US 2025/0362082 A1Innord Inc.
- Method of forming positive electrode active material, kiln, and heating furnace13 Nov 2025US 2025/0347466 A1Semiconductor Energy Laboratory Co.Ltd.
Most cited
By later US patents
- Graphite rotary tube furnace19US 6,042,370 AHaper International Corp. · 2000
- Metallic scrap decontamination process16US 4,411,695 AApros Corporation · 1983
- Countercurrent heat transfer device for solid particle streams16US 4,639,217 A1987
- Rotary kiln for calcination of light aggregate cement15US 6,468,074 B12002
- Rotary furnace for melting metal13US 4,337,929 ACollege Research Corporation · 1982