C02F 2209/18
Po4-p
C02F2209/18 (Po4-p) appears on 105 US grants and 147 published applications in this corpus.
Search patents in C02F- Granted patents
- 105
- Published applications
- 147
- Assignees
- 99
- Inventors
- 372
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 3 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 2 | 1 |
| 2008 | 3 | 1 |
| 2009 | 1 | 2 |
| 2010 | 4 | 6 |
| 2011 | 2 | 2 |
| 2012 | 3 | 1 |
| 2013 | 1 | 6 |
| 2014 | 4 | 14 |
| 2015 | 4 | 8 |
| 2016 | 5 | 10 |
| 2017 | 3 | 7 |
| 2018 | 4 | 4 |
| 2019 | 8 | 8 |
| 2020 | 2 | 12 |
| 2021 | 9 | 10 |
| 2022 | 9 | 7 |
| 2023 | 6 | 12 |
| 2024 | 6 | 10 |
| 2025 | 7 | 12 |
| 2026 | 8 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Resin for removing phosphorus from water body, and preparation method therefor and application thereof25 Aug 2026US 12,715,791 B2Sunresin New Materials Co. Ltd.
- Measuring and controlling organic matter in waste water stream18 Aug 2026US 12,709,561 B2Kemira Oyj
- Recycling automotive phosphate rinse water stream30 Jun 2026US 12,668,506 B2Ecolab USA Inc.
- Systems and methods for creating and segmenting treatment processes12 May 2026US 12,623,938 B2Enviromix, Inc.
- Method for removing ammoniacal nitrogen from hypersaline effluents through a consortium containing high-salinity-resistant heterotrophic nitrifying and aerobic denitrifying microorganisms12 May 2026US 12,623,941 B2Petroleo Brasileiro S.A. - Petrobras
- Systems and methods for creating and segmenting treatment processes10 Sep 2026US 2026/0265095 A1Enviromix, Inc.
- Doped goethite nanoparticles for regenerative adsorption, a method for said adsorption, and use of said nanoparticles25 Jun 2026US 2026/0175190 A1Aquacare Europe B.V.
- Water Distribution Regulation Method for Reclaimed Waterway Landscape Environments Based on Algae Risk Control5 Mar 2026US 2026/0061379 A1Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design)
- Method and system for controlling corrosion inhibitor feed5 Mar 2026US 2026/0062815 A1Chemtreat, Inc.
- Method for wastewater treatment19 Feb 2026US 2026/0049018 A1Inland Environmental Resources, Inc.
Most cited
By later US patents
- Sewage treatment process with phosphorus removal88US 6,712,970 B1Enviroquip, Inc. · 2004
- Method of controlling waste water purification plants using multiple control functions39US 5,589,068 AI. Kruger Systems A/S · 1996
- Biochemically enchanced thermophilic treatment process38US 6,036,862 A2000
- Chemical indicator obstruction detection system and method for an aquatic environment32US 8,797,523 B2Step Ahead Innovations, Inc. · 2014
- Method for eliminating phosphorous contained in effluents28US 6,077,430 ADegremont · 2000