F05C 2251/10
Hardness
F05C2251/10 (Hardness) appears on 87 US grants and 103 published applications in this corpus.
Search patents in F05C- Granted patents
- 87
- Published applications
- 103
- Assignees
- 90
- Inventors
- 316
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 3 |
| 2003 | 5 | 4 |
| 2004 | 0 | 2 |
| 2005 | 2 | 3 |
| 2006 | 4 | 4 |
| 2007 | 0 | 7 |
| 2008 | 1 | 5 |
| 2009 | 5 | 3 |
| 2010 | 3 | 4 |
| 2011 | 2 | 6 |
| 2012 | 3 | 5 |
| 2013 | 3 | 7 |
| 2014 | 2 | 6 |
| 2015 | 6 | 8 |
| 2016 | 3 | 3 |
| 2017 | 2 | 4 |
| 2018 | 4 | 4 |
| 2019 | 3 | 3 |
| 2020 | 4 | 2 |
| 2021 | 3 | 6 |
| 2022 | 4 | 3 |
| 2023 | 2 | 3 |
| 2024 | 2 | 3 |
| 2025 | 6 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a water-hydraulic machine24 Mar 2026US 12,584,470 B2Danfoss A/S
- Stator compound having an azide cured elastomeric base and stators and downhole motors using the same5 Aug 2025US 12,378,371 B2PV Fluid Products, Inc.
- Non-lubricated compressor with abradable sealing element and related method for assembling it1 Jul 2025US 12,345,262 B2Atlas Copco Airpower, Naamloze Vennootschap
- Gear pump with suction housing element providing a tight seal between suction and high-pressure chamber to increase pump efficiency and method of providing tight seal27 May 2025US 12,313,071 B1Hamilton Sundstrand Corporation
- Housing assembly for rotary engine6 May 2025US 12,291,991 B1Pratt & Whitney Canada Corp.
- Stator lining, stator and method for producing a stator lining30 Apr 2026US 2026/0121461 A1
- Stator compound having an azide cured elastomeric base and stators and downhole motors using the same2 Oct 2025US 2025/0304752 A1PV Fluid Products, Inc.
- Housing assembly for rotary engine16 Jan 2025US 2025/0020076 A1Pratt & Whitney Canada Corp.
- Stator for a Pump and Method for Producing a Stator for a Pump2 Jan 2025US 2025/0003405 A1NETZSCH Pumpen & Systeme GmbH
- Non-lubricated compressor with abradable sealing element and related method for assembling it26 Dec 2024US 2024/0426300 A1Atlas Copco Airpower, Naamloze Vennootschap
Most cited
By later US patents
- Wear resistant pump valve107US 4,518,329 A1985
- Dispensing Apparatus74US 5,697,527 AFluid Management, Inc. · 1997
- Gear pump having members with different hardnesses30US 5,785,510 AFluid Management Limited Partnership · 1998
- Stator for down hole drilling motor30US 6,905,319 B2Halliburton Energy Services.Inc. · 2005
- Capacity control valve26US 7,533,687 B2Eagle Industry Co., Ltd. · 2009