F05D 2250/25
Helical
Official title: helical
F05D2250/25 (Helical) appears on 299 US grants and 304 published applications in this corpus.
Search patents in F05D- Granted patents
- 299
- Published applications
- 304
- Assignees
- 123
- Inventors
- 713
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 4 |
| 2003 | 6 | 2 |
| 2004 | 5 | 10 |
| 2005 | 1 | 3 |
| 2006 | 7 | 6 |
| 2007 | 3 | 10 |
| 2008 | 4 | 7 |
| 2009 | 6 | 15 |
| 2010 | 9 | 9 |
| 2011 | 8 | 4 |
| 2012 | 10 | 11 |
| 2013 | 4 | 14 |
| 2014 | 9 | 11 |
| 2015 | 12 | 15 |
| 2016 | 5 | 21 |
| 2017 | 8 | 21 |
| 2018 | 13 | 19 |
| 2019 | 29 | 26 |
| 2020 | 17 | 25 |
| 2021 | 23 | 17 |
| 2022 | 22 | 17 |
| 2023 | 21 | 13 |
| 2024 | 15 | 11 |
| 2025 | 10 | 9 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulically driven de-oiler for gas turbine engines2 Jun 2026US 12,644,394 B2Rtx Corporation
- Turbine component with a thin interior partition7 Apr 2026US 12,595,742 B2Rtx Corporation
- System for cooling a refrigerant for an aircraft comprising a safety heating device and method for using such a system10 Feb 2026US 12,545,411 B2Safran Nacelles
- Space propulsion system13 Jan 2026US 12,523,189 B2
- Condenser for hydrogen steam injected turbine engine14 Oct 2025US 12,442,330 B2Rtx Corporation
- Carbon Radial Seal4 Jun 2026US 2026/0153056 A1Rtx Corporation
- Engine accessory mounting assembly14 May 2026US 2026/0132724 A1Pratt & Whitney Canada Corp.
- Gas turbine engine with entrained particle separators16 Apr 2026US 2026/0104008 A1Rtx Corporation
- Turbine blade for a gas turbine engine5 Feb 2026US 2026/0036054 A1Rtx Corporation
- Hydraulically driven de-oiler for gas turbine engines18 Dec 2025US 2025/0382896 A1Rtx Corporation
Most cited
By later US patents
- Spiral wound containment ring122US 5,163,809 APratt & Whitney Canada Corp. · 1992
- Integrated steam/air cooling system for gas turbines81US 5,340,274 AGeneral Electric Company · 1994
- Integrated steam and air cooling for combined cycle gas turbines80US 5,253,976 AGeneral Electric Company · 1993
- Exhaust turbocharger76US 7,343,742 B2Bayerische Motoren Werke Aktiengesellschaft · 2008
- Cooled turbine airfoils and methods of manufacture69US 7,306,026 B2United Technologies Corporation · 2007