E03D 1/30
Valves for high or low level cisterns
Official title: Valves for high or low level cisterns; Their arrangement (inlet valves, valves in general F16K ){; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage (flushing valves E03D1/142, E03D1/186, E03D1/266, E03D1/286)}
E03D1/30 (Valves for high or low level cisterns) appears on 764 US grants and 648 published applications in this corpus.
Search patents in E03D- Granted patents
- 764
- Published applications
- 648
- Assignees
- 195
- Inventors
- 1,001
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 13 | 0 |
| 1992 | 15 | 0 |
| 1993 | 18 | 0 |
| 1994 | 15 | 0 |
| 1995 | 12 | 0 |
| 1996 | 5 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 21 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 2 |
| 2002 | 15 | 12 |
| 2003 | 15 | 16 |
| 2004 | 15 | 21 |
| 2005 | 13 | 18 |
| 2006 | 6 | 23 |
| 2007 | 10 | 12 |
| 2008 | 2 | 21 |
| 2009 | 7 | 22 |
| 2010 | 9 | 32 |
| 2011 | 11 | 17 |
| 2012 | 25 | 22 |
| 2013 | 15 | 30 |
| 2014 | 20 | 23 |
| 2015 | 15 | 28 |
| 2016 | 25 | 36 |
| 2017 | 43 | 36 |
| 2018 | 31 | 39 |
| 2019 | 45 | 30 |
| 2020 | 36 | 36 |
| 2021 | 31 | 41 |
| 2022 | 25 | 30 |
| 2023 | 16 | 29 |
| 2024 | 34 | 21 |
| 2025 | 25 | 30 |
| 2026 | 16 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E03D 1/34Flushing valves for outlets295
- E03D 1/32Arrangement of inlet valves238
- E03D 1/304With valves with own buoyancy142
- E03D 1/36Associated working of inlet and outlet valves106
- E03D 1/33Adaptations or arrangements of floats77
- E03D 1/308With articulated valves35
- E03D 1/302With valves kept in open position by means of air or water27
Recent patents
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- Toilet24 Sep 2026US 2026/0286672 A1Kohler Co.
- Pneumatic drain valve driving device17 Sep 2026US 2026/0275694 A1Kohler (China) Investment Co., Ltd.
- Clean toilet and accessories10 Sep 2026US 2026/0266036 A1Kohler Co.
- Hydraulically controlled flushing device20 Aug 2026US 2026/0243073 A1Aspic
Most cited
By later US patents
- Water flow control device100US 6,681,418 B12004
- Adapter for toilet fitting88US 5,090,066 AFluidmaster, Inc. · 1992
- Automatic tank-type flusher48US 6,263,519 B1Arichell Technologies, Inc. · 2001
- Water saving device43US 4,980,932 A1991
- Universal positive shut off, metered water control system for use with flush toilet tanks43US 5,134,729 A1992