E02F 3/902
For modifying the concentration of the dredged material
Official title: {for modifying the concentration of the dredged material, e.g. relief valves preventing the clogging of the suction pipe}
E02F3/902 (For modifying the concentration of the dredged material) appears on 38 US grants and 25 published applications in this corpus.
Search patents in E02F- Granted patents
- 38
- Published applications
- 25
- Assignees
- 28
- Inventors
- 91
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 4 |
| 2015 | 3 | 2 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 0 | 2 |
| 2023 | 0 | 2 |
| 2024 | 4 | 4 |
| 2025 | 3 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Additive dosing assemblies and hydro excavation vacuum apparatus incorporating same28 Jul 2026US 12,692,684 B2Vermeer Manufacturing Company
- Pneumatic excavator and methods of use8 Apr 2025US 12,270,180 B2Sonny's HFI Holdings, LLC
- Pneumatic excavator and methods of use4 Mar 2025US 12,241,223 B2Sonny's HFI Holdings, LLC
- Mixing systems and methods including disk assemblies28 Jan 2025US 12,208,539 B2Vermeer Manufacturing Company
- Method for recovering rare-earth mud, and recovery system10 Sep 2024US 12,084,948 B2Japan Agency for Marine-Earth Science and Technology
- Pneumatic excavator and methods of use5 Mar 2026US 2026/0062886 A1Sonny's HFI Holdings, LLC
- Mixing systems having roller assemblies27 Nov 2025US 2025/0360472 A1
- Pneumatic excavator and methods of use1 Aug 2024US 2024/0254723 A1Sonny's HFI Holdings, LLC
- Pneumatic excavator and methods of use1 Aug 2024US 2024/0254725 A1Sonny's HFI Holdings, LLC
- Diaphragm wall cutter and method for cutting a cutting trench in the ground18 Jul 2024US 2024/0240427 A1BAUER Maschinen GmbH
Most cited
By later US patents
- Method and system for cleaning a water basin floor51US 6,017,400 AOrange County Water District · 2000
- Vacuum excavation system48US 5,791,073 AFiltration Manufacturing, Inc. · 1998
- Dredging apparatus having a diver-operated hand-held dredge head for quasi-closed loop system43US 4,854,058 ASloan Pump Company, Inc. · 1989
- Loop circuit dredging apparatus29US 4,807,373 ASloan Pump Company, Inc. · 1989
- Method of and apparatus for forming and transporting mud clogs16US 5,020,858 ATOA Corporation · 1991