F16K 15/1823
For ball check valves
Official title: {for ball check valves}
F16K15/1823 (For ball check valves) appears on 187 US grants and 154 published applications in this corpus.
Search patents in F16K- Granted patents
- 187
- Published applications
- 154
- Assignees
- 110
- Inventors
- 324
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 3 |
| 2004 | 1 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 5 |
| 2007 | 2 | 4 |
| 2008 | 1 | 2 |
| 2009 | 3 | 1 |
| 2010 | 1 | 8 |
| 2011 | 1 | 4 |
| 2012 | 7 | 5 |
| 2013 | 2 | 4 |
| 2014 | 1 | 4 |
| 2015 | 7 | 17 |
| 2016 | 7 | 13 |
| 2017 | 9 | 9 |
| 2018 | 15 | 18 |
| 2019 | 16 | 8 |
| 2020 | 13 | 20 |
| 2021 | 9 | 5 |
| 2022 | 8 | 4 |
| 2023 | 7 | 5 |
| 2024 | 5 | 5 |
| 2025 | 3 | 5 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic fluid release valve assemblies21 Apr 2026US 12,607,271 B2Roadtek Enterprises Inc.
- Rocker arm assembly7 Apr 2026US 12,595,753 B2Eaton Intelligent Power Limited
- Vacuum pump10 Feb 2026US 12,546,300 B2Milwaukee Electric Tool Corporation
- Valves25 Mar 2025US 12,258,959 B2Jacobsen Innovations, Inc.
- Magnetically tunable microfluidic check valve, microfluidic pumps, syringe pump, and methods of manufacturing thereof25 Mar 2025US 12,259,060 B2Dartmouth Ocean Technologies Inc.
- Hydraulic fluid release valve assemblies25 Sep 2025US 2025/0297688 A1Rubicon Inc.
- Differential pressure actuated flow valve18 Sep 2025US 2025/0290387 A1MS Directional, LLC
- Rocker arm assembly24 Apr 2025US 2025/0129729 A1Eaton Intelligent Power Limited
- Reservoir filling system for an electronic vaping device13 Feb 2025US 2025/0056680 A1Altria Client Services LLC
- Electromagnetic Check Valve with a Deformable Ferromagnetic Plugging Element for Fluid Flow Control2 Jan 2025US 2025/0003518 A1
Most cited
By later US patents
- Downhole pump with standing valve assembly which guides the ball off-center97US 6,007,314 A1999
- Oil drainage coupler76US 5,048,578 A1991
- Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography73US 5,601,707 AIsco, Inc. · 1997
- Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography55US 5,614,089 AIsco, Inc. · 1997
- Apparatus and method for pumping supercritical fluid and measuring flow thereof55US 5,755,559 AIsco, Inc. · 1998