C02F 5/02
Softening water by precipitation of the hardness
C02F5/02 (Softening water by precipitation of the hardness) appears on 357 US grants and 404 published applications in this corpus.
Search patents in C02F- Granted patents
- 357
- Published applications
- 404
- Assignees
- 247
- Inventors
- 891
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 0 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 4 |
| 2003 | 6 | 8 |
| 2004 | 4 | 10 |
| 2005 | 6 | 10 |
| 2006 | 6 | 7 |
| 2007 | 3 | 9 |
| 2008 | 8 | 19 |
| 2009 | 3 | 12 |
| 2010 | 11 | 16 |
| 2011 | 9 | 15 |
| 2012 | 10 | 16 |
| 2013 | 4 | 14 |
| 2014 | 11 | 19 |
| 2015 | 7 | 17 |
| 2016 | 14 | 38 |
| 2017 | 18 | 17 |
| 2018 | 11 | 16 |
| 2019 | 25 | 25 |
| 2020 | 16 | 15 |
| 2021 | 25 | 22 |
| 2022 | 7 | 20 |
| 2023 | 22 | 20 |
| 2024 | 17 | 17 |
| 2025 | 16 | 23 |
| 2026 | 13 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for desalination of liquids22 Sep 2026US 12,741,888 B2Acquolina Il Mondo, LLC
- Process for removing hardness and total organic carbon from drinking water25 Aug 2026US 12,715,796 B2Veolia Water Solutions & Technologies Support
- Methods of PFAS destruction using UV irradiation at 222 nanometers16 Jun 2026US 12,655,051 B2Claros Technologies Inc.
- Method and system for wastewater treatment by membrane filtration and electrochemical oxidation26 May 2026US 12,637,374 B2Axine Water Technologies Inc.
- Ozone treatment of mining effluents26 May 2026US 12,637,376 B2Asdr Canada Inc.
- Ice maker appliance scale cartridge1 Oct 2026US 2026/0296940 A1Haier US Appliance Solutions, Inc.
- Methods of PFAS Destruction using UV Irradiation at 222 Nanometers17 Sep 2026US 2026/0274731 A1Claros Technologies Inc.
- Method of processing drinking water treatment material20 Aug 2026US 2026/0242268 A1Reale Lime
- System and method for producing alkaline water having ph stability and increased mineral content23 Jul 2026US 2026/0209078 A1Generosity Water, Inc.
- Methods and Systems of Iodine Capture from Aqueous Solutions21 May 2026US 2026/0138905 A1Claros Technologies Inc.
Most cited
By later US patents
- Purification of saline water838US 4,036,749 A1977
- Methods to de-sulfate saline streams107US 7,789,159 B12010
- Treatment of industrial waste water74US 4,188,291 A1980
- Cooling tower system71US 4,931,187 AKlenzoid, Inc. · 1990
- Process for sterilization and removal of inorganic salts from a water stream61US 4,392,959 A1983