F23D 2209/30
Purging
F23D2209/30 (Purging) appears on 111 US grants and 86 published applications in this corpus.
Search patents in F23D- Granted patents
- 111
- Published applications
- 86
- Assignees
- 49
- Inventors
- 280
- Latest grant
- 4 Aug 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 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 3 |
| 2004 | 2 | 6 |
| 2005 | 4 | 3 |
| 2006 | 3 | 6 |
| 2007 | 1 | 5 |
| 2008 | 3 | 1 |
| 2009 | 2 | 5 |
| 2010 | 5 | 1 |
| 2011 | 3 | 4 |
| 2012 | 0 | 4 |
| 2013 | 4 | 4 |
| 2014 | 0 | 2 |
| 2015 | 5 | 3 |
| 2016 | 5 | 4 |
| 2017 | 3 | 5 |
| 2018 | 1 | 5 |
| 2019 | 7 | 0 |
| 2020 | 4 | 5 |
| 2021 | 1 | 3 |
| 2022 | 3 | 5 |
| 2023 | 6 | 3 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel systems and methods for purging4 Aug 2026US 12,698,743 B2Pratt & Whitney Canada Corp.
- Gas turbine control device, gas turbine, and gas turbine control method23 Jun 2026US 12,662,961 B2Mitsubishi Heavy Industries, Ltd.
- Purge system for dual-fuel gas turbine engine12 May 2026US 12,624,665 B2Vericor Power Systems LLC
- Methods and apparatus to regulate a gaseous fuel system27 Jan 2026US 12,535,039 B2General Electric Company
- Fuel systems and methods for purging7 Oct 2025US 12,435,675 B2Pratt & Whitney Canada Corp.
- Methods and apparatus to regulate a gaseous fuel system4 Jun 2026US 2026/0153055 A1General Electric Company
- Fuel systems and methods for purging15 Jan 2026US 2026/0015979 A1Pratt & Whitney Canada Corp.
- Method of operating hydrogen gas supply system15 Jan 2026US 2026/0016156 A1Kawasaki Jukogyo Kabushiki Kaisha
- Methods and apparatus to regulate a gaseous fuel system17 Jul 2025US 2025/0230774 A1General Electric Company
- Gas turbine control device, gas turbine, and gas turbine control method20 Feb 2025US 2025/0059917 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Dual orifice bypass system for dual-fuel gas turbine181US 6,145,318 AGeneral Electric Company · 2000
- Dual fuel mixer for gas turbine combustor97US 5,778,676 AGeneral Electric Company · 1998
- Dual fuel mixer for gas turbine combustor83US 5,680,766 AGeneral Electric Company · 1997
- Multi-stage fuel nozzle for reducing combustion instabilities in low NOX gas turbines66US 5,408,830 AGeneral Electric Company · 1995
- Gas turbine dual fuel burners59US 4,425,755 AROLLS-ROYCE plc · 1984