E03D 1/302
With valves kept in open position by means of air or water
Official title: {with valves kept in open position by means of air or water pressure or by vacuum}
E03D1/302 (With valves kept in open position by means of air or water) appears on 27 US grants and 23 published applications in this corpus.
Search patents in E03D- Granted patents
- 27
- Published applications
- 23
- Assignees
- 10
- Inventors
- 43
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 2 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 3 |
| 2020 | 5 | 1 |
| 2021 | 0 | 5 |
| 2022 | 6 | 3 |
| 2023 | 1 | 3 |
| 2024 | 4 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flushometer system14 Oct 2025US 12,442,168 B2Sloan Valve Company
- Pneumatic valve control device26 Nov 2024US 12,152,380 B2Kohler (China) Investment Co., Ltd.
- Flush water tank apparatus and flush toilet apparatus provided with the same16 Jul 2024US 12,037,779 B2Toto Ltd.
- Air release valve and air pressure driven toilet water tank drain valve2 Jul 2024US 12,024,869 B2Lab (Xiamen) Sanitary Fittings Inc.
- Pneumatic valve control device16 Jan 2024US 11,873,630 B2Kohler (China) Investment Co., Ltd.
- Flushometer System23 Apr 2026US 2026/0110161 A1Sloan Valve Company
- System and Method for Run-On Detection28 Aug 2025US 2025/0270801 A1Sloan Valve Company
- Pneumatic valve control device28 Dec 2023US 2023/0417036 A1Kohler (China) Investment Co., Ltd.
- Pneumatic valve control device22 Jun 2023US 2023/0193610 A1Kohler (China) Investment Co., Ltd.
- Air release valve and air pressure driven toilet water tank drain valve25 May 2023US 2023/0160190 A1Lab (Xiamen) Sanitary Fittings Inc.
Most cited
By later US patents
- Toilet water reservoir water dumping valve for sealing the reservoir's water outlet by hydraulic pressure, and controlling water volume20US 5,652,970 A1997
- Universal toilet tank water saving device11US 5,073,995 ANeubauer-Jennison Construction · 1991
- Two-stage water discharge mechanism for flush toilet tank7US 5,003,644 A1991
- Flush mechanism for toilets4US 5,088,133 A1992
- Siphon activated valve3US 10,774,512 B2Fluidmaster, Inc. · 2020