F23Q 3/004
Igniters using electrically-produced sparks: using semiconductor elements
Official title: {Using semiconductor elements}
F23Q3/004 (Igniters using electrically-produced sparks: using semiconductor elements) appears on 93 US grants and 30 published applications in this corpus.
Search patents in F23Q- Granted patents
- 93
- Published applications
- 30
- Assignees
- 63
- Inventors
- 127
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 4 |
| 2011 | 1 | 4 |
| 2012 | 3 | 2 |
| 2013 | 2 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 3 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric propulsion system including heaterless dispenser cathode11 Nov 2025US 12,467,627 B2Aerojet Rocketdyne, Inc.
- Flame detection and ignition device4 Feb 2025US 12,215,860 B2John Zink Company
- Electric propulsion system including heaterless dispenser cathode23 Jul 2024US 12,044,407 B2Aerojet Rocketdyne, Inc.
- Corona ignition with self-tuning power amplifier1 Jan 2019US 10,170,895 B2Tenneco Inc.
- High energy ignition spark igniter1 Nov 2016US 9,484,717 B2Chentronics, LLC
- Temperature control system for hot surface igniter21 May 2026US 2026/0139835 A1Chongqing Le-Mark Technology Co
- Ignition systems for exothermic welding1 May 2025US 2025/0137641 A1ERICO International Corporation
- Electric propulsion system including heaterless dispenser cathode26 Sep 2024US 2024/0318820 A1Aerojet Rocketdyne, Inc.
- Candle igniter device and system11 Jan 2024US 2024/0011634 A1
- Electric propulsion system including heaterless dispenser cathode26 May 2022US 2022/0165533 A1Aerojet Rocketdyne, Inc.
Most cited
By later US patents
- Ignition boost and rectification flame detection circuit115US 6,222,719 B12001
- Direct spark ignition system63US 4,626,193 AITT Corporation · 1986
- Portable gas torch suitable for igniting a flame in combustion equipment34US 9,097,423 B2Honeywell International Inc. · 2015
- Solid-state exciter circuit with two drive pulses having indendently adjustable durations31US 5,654,868 ASL Aburn, Inc. · 1997
- Circuit arrangement for flame detection30US 5,599,180 ABeru Ruprecht GmbH & Co. KG · 1997