C02F 3/043
Devices for distributing water over trickle filters
Official title: {Devices for distributing water over trickle filters}
C02F3/043 (Devices for distributing water over trickle filters) appears on 61 US grants and 45 published applications in this corpus.
Search patents in C02F- Granted patents
- 61
- Published applications
- 45
- Assignees
- 44
- Inventors
- 106
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 3 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 3 | 3 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 2 |
| 2018 | 1 | 3 |
| 2019 | 4 | 2 |
| 2020 | 2 | 3 |
| 2021 | 4 | 5 |
| 2022 | 4 | 5 |
| 2023 | 1 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods of removing toxic substances from water using vermifiltration24 Feb 2026US 12,559,398 B2Perca, Inc.
- In situ fluid diffusion apparatus and system11 Mar 2025US 12,246,976 B2Rhizoscape Technologies Pty Ltd
- Method for optimization of filtration in an aquaculture system3 Dec 2024US 12,156,516 B2Atlantic Sapphire IP, LLC
- A/O tower integrated device for biological treatment of organic sewage containing COD and nitrogen and method by using the same1 Oct 2024US 12,103,882 B2Zhejiang Haihe Environmental Technology Co., Ltd.
- Sewage uniform distribution treatment device for aerobic granular sludge system and use method therefor2 Jan 2024US 11,858,838 B2Beijing Drainage Group Co., Ltd
- Systems and methods of removing toxic substances from water using vermifiltration25 Jun 2026US 2026/0176181 A1Perca, Inc.
- Systems and methods of removing toxic substances from water using vermifiltration24 Jul 2025US 2025/0236547 A1Perca, Inc.
- In Situ Fluid Diffusion Apparatus and System11 Jul 2024US 2024/0228345 A1Rhizoscape Technologies Pty Ltd
- Small sewage treatment plant10 Aug 2023US 2023/0249987 A1
- Method for optimization of filtration in an aquaculture system16 Mar 2023US 2023/0079755 A1Atlantic Sapphire IP, LLC
Most cited
By later US patents
- Constructed wetlands to control nonpoint source pollution58US 5,174,897 AThe United States of America as represented by the Secretary of Agriculture · 1992
- Process for minute dosing of gravity media filters35US 6,334,958 B12002
- System for pollution suppression26US 3,998,714 ATII Corporation · 1976
- Process for treating organic wastes23US 5,277,814 ATexaco Inc. · 1994
- Organic waste recycling system and method21US 4,882,058 ARamos-Thibault Corp. · 1989