F23N 2229/06
Flame sensors: with periodical shutters
Official title: with periodical shutters; Modulation signals
F23N2229/06 (Flame sensors: with periodical shutters) appears on 22 US grants and 13 published applications in this corpus.
Search patents in F23N- Granted patents
- 22
- Published applications
- 13
- Assignees
- 20
- Inventors
- 48
- Latest grant
- 30 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Burner including an electrical permittivity or electrical capacitance flame sensor30 Jul 2024US 12,050,151 B2Clearsign Technologies Corporation
- Variable composition gas mixture sensor11 Jun 2024US 12,007,301 B2Clearsign Technologies Corporation
- Flame monitor31 Aug 2021US 11,105,509 B2Siemens Aktiengesellschaft
- Flame sensing13 Nov 2018US 10,126,164 B2General Electric Company
- Circuit diagnostics from flame sensing AC component4 Nov 2014US 8,875,557 B2Honeywell International Inc.
- Detection apparatus and combustion system9 Jan 2025US 2025/0012667 A1Yokogawa Electric Corporation
- Burner including an electrical permittivity or electrical capacitance flame sensor7 Nov 2024US 2024/0369452 A1Clearsign Technologies Corporation
- Burner including an electrical permittivity or electrical capacitance flame sensor19 Aug 2021US 2021/0254826 A1Clearsign Technologies Corporation
- Variable composition gas mixture sensor19 Aug 2021US 2021/0255063 A1Clearsign Technologies Corporation
- Optical flame-sensor15 Oct 2020US 2020/0326243 A1OnPoint Technologies, LLC
Most cited
By later US patents
- Automatic burner monitor and control for furnaces49US 4,043,742 AEnvironmental Data Corporation · 1977
- Combustion control device32US 5,026,272 AYamatake-Honeywell Co., Ltd. · 1991
- Flame detector, method and fuel valve control30US 7,088,253 B2Protection Controls Inc. · 2006
- Flame sensing system22US 4,160,163 ASecurity Patrols Co., Ltd. · 1979
- Flame scanning system22US 4,823,114 ACoen Company, Inc. · 1989