E03D 1/304
With valves with own buoyancy
Official title: {with valves with own buoyancy}
E03D1/304 (With valves with own buoyancy) appears on 142 US grants and 125 published applications in this corpus.
Search patents in E03D- Granted patents
- 142
- Published applications
- 125
- Assignees
- 42
- Inventors
- 239
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 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 | 9 | 0 |
| 1993 | 11 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 6 | 5 |
| 2003 | 6 | 7 |
| 2004 | 5 | 7 |
| 2005 | 1 | 5 |
| 2006 | 2 | 6 |
| 2007 | 2 | 5 |
| 2008 | 0 | 8 |
| 2009 | 3 | 7 |
| 2010 | 1 | 7 |
| 2011 | 3 | 4 |
| 2012 | 10 | 5 |
| 2013 | 7 | 8 |
| 2014 | 4 | 4 |
| 2015 | 1 | 4 |
| 2016 | 4 | 3 |
| 2017 | 5 | 6 |
| 2018 | 4 | 2 |
| 2019 | 6 | 3 |
| 2020 | 2 | 6 |
| 2021 | 8 | 6 |
| 2022 | 2 | 4 |
| 2023 | 3 | 4 |
| 2024 | 4 | 1 |
| 2025 | 5 | 4 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Omni configured flapper systems for various flush valve sizes and methods of retrofit30 Sep 2025US 12,428,827 B2Fluidmaster, Inc.
- Reconfigurable flapper for different sized flush valves15 Jul 2025US 12,359,413 B2Lavelle Industries, Inc.
- Adjustable toilet flapper valve assembly13 May 2025US 12,297,634 B2Lavelle Industries, Inc.
- Water-saving siphonic toilet and equalization system therefor6 May 2025US 12,291,857 B2P & C Hennessy Holdings, Inc.
- System and method for a low flush toilet system11 Mar 2025US 12,247,382 B2Strategic Water Solutions Holdings, LLC
- Reconfigurable flapper for different sized flush valves16 Jul 2026US 2026/0201684 A1Lavelle Industries, Inc.
- Flowrate-increasing drain valve28 May 2026US 2026/0146428 A1Zhongshan Meitu Plastic Ind. Co., Ltd.
- Omni configured flapper systems for various flush valve sizes and methods of retrofit29 Jan 2026US 2026/0028808 A1Fluidmaster, Inc.
- Flush Valve Assembly1 Jan 2026US 2026/0002348 A1AS America, Inc.
- Reconfigurable flapper assembly for toilet flush valve20 Nov 2025US 2025/0354364 A1Lavelle Industries, Inc.
Most cited
By later US patents
- Adapter for toilet fitting88US 5,090,066 AFluidmaster, Inc. · 1992
- Automatic flushing actuator for tank style toilet21US 7,140,050 B2Technical Concepts, LLC · 2006
- Limited volume high performance flush valve assembly20US 8,079,095 B2Ideal Standard International BVBA · 2011
- Self-venting tank valve for toilet tanks19US 3,955,218 A1976
- Water saving dual flush system of valving19US 6,829,787 B12004