F16K 31/28
With two ore more floats actuating one valve
Official title: with two ore more floats actuating one valve
F16K31/28 (With two ore more floats actuating one valve) appears on 26 US grants and 23 published applications in this corpus.
Search patents in F16K- Granted patents
- 26
- Published applications
- 23
- Assignees
- 25
- Inventors
- 53
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 2 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 3 | 3 |
| 2020 | 1 | 2 |
| 2021 | 3 | 1 |
| 2022 | 1 | 3 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
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- Improvements relating to siphon systems and vacuum pumps7 Mar 2024US 2024/0077144 A1
- Humidifier18 Jan 2024US 2024/0019162 A1Sharp Kabushiki Kaisha
- Overfill prevention valve26 Jan 2023US 2023/0025926 A1Clay and Bailey Manufacturing Company
- Negative Pressure Pipeline Opening and Closing Device1 Dec 2022US 2022/0381365 A1Shanghai ZTEC Environmental S&T CO., LTD.
Most cited
By later US patents