F23N 2237/10
High or low fire
F23N2237/10 (High or low fire) appears on 132 US grants and 121 published applications in this corpus.
Search patents in F23N- Granted patents
- 132
- Published applications
- 121
- Assignees
- 96
- Inventors
- 303
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 5 | 5 |
| 2006 | 2 | 0 |
| 2007 | 2 | 2 |
| 2008 | 1 | 4 |
| 2009 | 1 | 6 |
| 2010 | 1 | 8 |
| 2011 | 3 | 8 |
| 2012 | 5 | 6 |
| 2013 | 2 | 6 |
| 2014 | 6 | 5 |
| 2015 | 6 | 6 |
| 2016 | 9 | 2 |
| 2017 | 4 | 7 |
| 2018 | 5 | 5 |
| 2019 | 5 | 4 |
| 2020 | 3 | 7 |
| 2021 | 5 | 6 |
| 2022 | 5 | 9 |
| 2023 | 7 | 3 |
| 2024 | 5 | 8 |
| 2025 | 3 | 4 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Boiler and method for stage change control thereof26 May 2026US 12,638,192 B2Kyungdong Navien Co., Ltd.
- Atomization burner with flexible fire rate14 Apr 2026US 12,601,481 B2Babington Technology, Inc.
- High turndown combustion system and method9 Dec 2025US 12,492,816 B2Camus Hydronics Limited
- Dual venturi7 Oct 2025US 12,435,874 B2Kyungdong Navien Co., Ltd.
- Burner system1 Jul 2025US 12,345,415 B2Environmental Energy Services, Inc.
- Venturi for boiler2 Jul 2026US 2026/0185704 A1Kyungdong Navien Co., Ltd.
- Premixer and gas device2 Jul 2026US 2026/0185709 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- System and method for ultra-low fire gas heat algorithms11 Jun 2026US 2026/0160417 A1
- Burner body with variable gas outlet area30 Apr 2026US 2026/0117969 A1Ariston S.P.A.
- Gas system, heating apparatus and temperature regulating control method29 Jan 2026US 2026/0029125 A1Chant Heat Energy Science & Technology (Zhongshan) Co., LTD.
Most cited
By later US patents
- Integrated furnace control69US 5,271,556 AAmerican Standard Inc. · 1993
- Electronic gas cooktop control with simmer system and method thereof69US 7,255,100 B2CompuValve LLC · 2007
- Adaptive microprocessor control system and method for providing multiple heating modes in twinned furnaces61US 5,337,952 ACarrier Corporation · 1994
- Multistage warm air furnace with single stage thermostat and return air sensor and method of operating same54US 6,925,999 B2American Standard International Inc. · 2005
- Adjustable two-stage fluid pressure regulating valve53US 4,932,430 AEmerson Electric Co. · 1990