F01C 19/04
Of rigid material
Official title: of rigid material
F01C19/04 (Of rigid material) appears on 64 US grants and 24 published applications in this corpus.
Search patents in F01C- Granted patents
- 64
- Published applications
- 24
- Assignees
- 27
- Inventors
- 86
- Latest grant
- 14 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 2 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 3 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rotary engine with seal having elastomeric and metallic members14 Jan 2025US 12,196,154 B2Pratt & Whitney Canada Corp.
- Rotary internal combustion engine10 Aug 2021US 11,085,298 B1
- Apex and face seals with rotary internal combustion engine26 Dec 2017US 9,850,758 B2Pratt & Whitney Canada Corp.
- Pump and its manufacturing method2 May 2017US 9,638,204 B2Quantex Patents Limited
- Pump having a housing and a rotor capable of rotating in the housing28 Feb 2017US 9,581,157 B2Quantex Patents Limited
- Rotary engine with seal having elastomeric and metallic members5 Dec 2024US 2024/0401545 A1Pratt & Whitney Canada Corp.
- Wankel pump cycle residual boost system20 Jul 2023US 2023/0228195 A1
- Surface texture and groove designs for sliding contacts24 Sep 2020US 2020/0300091 A1Northwestern University
- Free rotary fluid machine7 Dec 2017US 2017/0350250 A1
- Rotary device including a counterbalanced seal assembly3 Mar 2016US 2016/0061038 A1GoTek Energy, Inc.
Most cited
By later US patents
- Continuous external heat engine32US 5,410,998 A1995
- Rotary Wankel type engine31US 5,305,721 A1994
- Rotary engine20US 4,548,171 A1985
- Rotary diesel engine19US 3,994,266 ACurtiss-Wright Corporation · 1976
- Rotary engine with modified trochoidally shaped inner wall16US 3,958,906 ABriggs & Stratton Corporation · 1976