F27B 9/068
Heated by radiant tubes, the tube being heated by a hot medium
Official title: {heated by radiant tubes, the tube being heated by a hot medium, e.g. hot gases}
F27B9/068 (Heated by radiant tubes, the tube being heated by a hot medium) appears on 41 US grants and 21 published applications in this corpus.
Search patents in F27B- Granted patents
- 41
- Published applications
- 21
- Assignees
- 37
- Inventors
- 93
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 2 | 3 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radiant heating element with free end24 Feb 2026US 12,560,382 B2Drever International S.A.
- Support device for radiant tubes10 Sep 2024US 12,084,741 B2
- Far-infrared radiation multi-stage type heating furnace for steel sheets for hot stamping25 Jul 2023US 11,708,620 B2Nippon Steel & Sumikin Texeng. Co., Ltd.
- Device for indirect heating by radiation in the form of a radiant housing27 Sep 2022US 11,454,392 B2Drever International S.A.
- Thermal process device with non-uniform insulation17 Nov 2020US 10,837,703 B2Sandvik Thermal Process, Inc.
- Method for heating a furnace29 Jan 2026US 2026/0029198 A1
- Flame tube for improved uniformity of the radiant tube temperature20 Mar 2025US 2025/0093026 A1Honeywell International Inc.
- Radiant heating element with free end26 Jan 2023US 2023/0023783 A1Drever International S.A.
- Support device for radiant tubes20 May 2021US 2021/0147958 A1
- Device for indirect heating by radiation in the form of a radiant housing14 Nov 2019US 2019/0346132 A1Drever International S.A.
Most cited
By later US patents
- Tunnel-type conveyor oven having two types of heat sources62US 5,906,485 AReading Pretzel Machinery Corp. · 1999
- Thermal treating apparatus and process40US 5,997,286 AFord Motor Company · 1999
- Roller hearth type heat treating furnace27US 4,932,864 AChugai Ro Co., Ltd. · 1990
- Radiant tube type heater27US 5,016,610 AToshiba Ceramics Co., Ltd. · 1991
- Exhaust oven for cathode ray tubes25US 4,752,268 AChugai Ro Co., Ltd. · 1988