C02F 1/645
Devices for iron precipitation and treatment by air
Official title: {Devices for iron precipitation and treatment by air}
C02F1/645 (Devices for iron precipitation and treatment by air) appears on 57 US grants and 10 published applications in this corpus.
Search patents in C02F- Granted patents
- 57
- Published applications
- 10
- Assignees
- 29
- Inventors
- 85
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 2 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Recycling system4 Aug 2026US 12,698,223 B2BYD Company Limited
- System for water treatment and method7 Mar 2017US 9,586,839 B21720618 Ontario Inc.
- Method for treating acidic waters using recycled acidic and basic sludges20 Jul 2010US 7,758,758 B2Noram Engineering and Constructors Ltd.
- Assembly for removing mineral contaminants25 May 2010US 7,722,760 B2Griesbach Corporation
- Remover for heavy metals contained in water18 Dec 2007US 7,309,676 B2Japan EnviroChemicals, Ltd.
- Recycling system6 Jul 2023US 2023/0212043 A1BYD Company Limited
- System for water treatment and method26 Jun 2014US 2014/0175016 A11720618 Ontario Inc.
- Method and Plant for Purifying Raw Water6 Jun 2013US 2013/0140243 A1
- Methods and apparatus for electrolytic treatment of water2 Oct 2008US 2008/0237060 A1
- Liquid Filter and Methods of Removing Contaminants22 May 2008US 2008/0116143 A1Griesbach Corporation
Most cited
By later US patents
- In-situ remediation system and method for contaminated groundwater121US 4,832,122 AThe United States of America as represented by the United States Department of Energy · 1989
- Treating means for bodies of water66US 4,308,138 A1981
- Water/wastewater treatment apparatus61US 4,871,450 ACamp Dresser & McKee · 1989
- Decontamination of sites where organic compound contaminants endanger the water supply57US 4,892,664 AGroundwater Technology, Inc. · 1990
- Treating device for large bodies of water37US 4,226,719 A1980