F23C 5/32
To obtain rotating flames, i.e. flames moving helically or spirally
Official title: to obtain rotating flames, i.e. flames moving helically or spirally
F23C5/32 (To obtain rotating flames, i.e. flames moving helically or spirally) appears on 87 US grants and 84 published applications in this corpus.
Search patents in F23C- Granted patents
- 87
- Published applications
- 84
- Assignees
- 63
- Inventors
- 274
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 6 |
| 2004 | 8 | 7 |
| 2005 | 2 | 6 |
| 2006 | 0 | 1 |
| 2007 | 1 | 5 |
| 2008 | 2 | 2 |
| 2009 | 4 | 4 |
| 2010 | 1 | 4 |
| 2011 | 2 | 3 |
| 2012 | 3 | 2 |
| 2013 | 1 | 3 |
| 2014 | 0 | 8 |
| 2015 | 5 | 5 |
| 2016 | 1 | 7 |
| 2017 | 6 | 3 |
| 2018 | 1 | 6 |
| 2019 | 1 | 0 |
| 2020 | 2 | 2 |
| 2021 | 1 | 1 |
| 2022 | 3 | 3 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Combustion device and boiler2 Jun 2026US 12,644,597 B2IHI Corporation
- Gas incinerator system15 Oct 2024US 12,117,170 B2
- System and method for operating a combustion chamber4 Apr 2023US 11,619,384 B2General Electric Technology GmbH
- Supercritical CO2 boiler capable of realizing uniform combustion, corrosion resistance and coking resistance, and boiler system8 Nov 2022US 11,493,202 B2Huazhong University of Science and Technology
- Gas-burning furnace16 May 2024US 2024/0158277 A1Rockwool A/S
- Cement kiln burner and method for operating same14 Mar 2024US 2024/0085016 A1Taiheiyo Cement Corporation
- Combustion device and boiler14 Sep 2023US 2023/0288061 A1IHI Corporation
- Wall-arranged giant ring-shaped straight-through pulverized coal burner7 Sep 2023US 2023/0280027 A1Shanghai Jiao Tong University
- Gas incinerator system2 Jun 2022US 2022/0170633 A1Questor Technology Inc.
Most cited
By later US patents
- Large scale vortex devices for improved burner operation99US 6,752,620 B2Air Products and Chemicals, Inc. · 2004
- Tangential firing system40US 4,294,178 ACombustion Engineering, Inc. · 1981
- Apparatus for combusting a fuel at high pressure and high temperature, and associated system40US 8,986,002 B28 Rivers Capital, LLC · 2015
- System for injecting overfire air into a tangentially-fired furnace39US 4,672,900 ACombustion Engineering, Inc. · 1987
- Integrated low NO.sub.x tangential firing system36US 5,315,939 ACombustion Engineering, Inc. · 1994