F04C 2250/30
Geometry: of the stator
Official title: of the stator
F04C2250/30 (Geometry: of the stator) appears on 129 US grants and 139 published applications in this corpus.
Search patents in F04C- Granted patents
- 129
- Published applications
- 139
- Assignees
- 79
- Inventors
- 280
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 3 | 6 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 3 | 4 |
| 2012 | 1 | 4 |
| 2013 | 6 | 8 |
| 2014 | 3 | 8 |
| 2015 | 2 | 11 |
| 2016 | 5 | 5 |
| 2017 | 11 | 2 |
| 2018 | 9 | 14 |
| 2019 | 4 | 8 |
| 2020 | 11 | 4 |
| 2021 | 5 | 14 |
| 2022 | 9 | 10 |
| 2023 | 15 | 9 |
| 2024 | 8 | 8 |
| 2025 | 12 | 11 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adding system for fire-extinguishing units26 May 2026US 12,636,532 B2Firedos GmbH
- Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane7 Apr 2026US RE50,855 E1LG Electronics Inc.
- Pump device, respiratory device and method for providing a respiratory gas24 Mar 2026US 12,582,793 B2Weinmann Emergency Medical Technology GmbH + Co. KG
- Single sliding vane rotary displacement pump23 Dec 2025US 12,503,942 B1Ace Machine Design Inc.
- Rotor tilt compensation in PDM stators2 Dec 2025US 12,486,771 B2Abaco Drilling Technologies LLC
- Pump stator tie-layer with surface roughness20 Aug 2026US 2026/0243253 A1Schlumberger Technology Corporation
- Stator with non-uniform thickness for one-to-two lobe ratio pumps6 Aug 2026US 2026/0226894 A1Schlumberger Technology Corporation
- Compensation for rotor tilt in hybrid pdm stators12 Mar 2026US 2026/0071545 A1Abaco Drilling Technologies LLC
- Stators for Eccentric Screw Pumps, Eccentric Screw Pump and Production Method26 Feb 2026US 2026/0055761 A1NETZSCH Pumpen & Systeme GmbH
- Plasticizer extending dynamic fatigue life in fiber reinforced elastomers11 Dec 2025US 2025/0376581 A1Abaco Drilling Technologies LLC
Most cited
By later US patents
- Vane type compressor having elliptical stator with doubly-offset rotor52US 4,410,305 AThe Rovac Corporation · 1983
- Rotary internal combustion diesel engine19US 8,539,931 B12013
- Through vane type rotary compressor with specific chamber configuration18US 4,484,873 ANippon Soken, Inc. · 1984
- Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps18US 6,236,897 B12001
- Sliding-vane rotary compressor with specific cylinder bore profile17US 4,616,984 ANippon Soken, Inc. · 1986