C02F 5/08
Treatment of water with complexing chemicals or other solubilising agents for softening
Official title: Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
C02F5/08 (Treatment of water with complexing chemicals or other solubilising agents for softening) appears on 1,712 US grants and 1,095 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,712
- Published applications
- 1,095
- Assignees
- 636
- Inventors
- 2,985
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 46 | 0 |
| 1977 | 48 | 0 |
| 1978 | 47 | 0 |
| 1979 | 28 | 0 |
| 1980 | 25 | 0 |
| 1981 | 36 | 0 |
| 1982 | 26 | 0 |
| 1983 | 23 | 0 |
| 1984 | 40 | 0 |
| 1985 | 47 | 0 |
| 1986 | 34 | 0 |
| 1987 | 49 | 0 |
| 1988 | 32 | 0 |
| 1989 | 53 | 0 |
| 1990 | 57 | 0 |
| 1991 | 45 | 0 |
| 1992 | 48 | 0 |
| 1993 | 40 | 0 |
| 1994 | 46 | 0 |
| 1995 | 37 | 0 |
| 1996 | 34 | 0 |
| 1997 | 46 | 0 |
| 1998 | 37 | 0 |
| 1999 | 34 | 0 |
| 2000 | 33 | 0 |
| 2001 | 34 | 5 |
| 2002 | 28 | 22 |
| 2003 | 23 | 30 |
| 2004 | 13 | 33 |
| 2005 | 8 | 22 |
| 2006 | 20 | 18 |
| 2007 | 14 | 37 |
| 2008 | 15 | 30 |
| 2009 | 7 | 35 |
| 2010 | 23 | 45 |
| 2011 | 35 | 51 |
| 2012 | 19 | 46 |
| 2013 | 25 | 60 |
| 2014 | 30 | 50 |
| 2015 | 33 | 59 |
| 2016 | 39 | 55 |
| 2017 | 28 | 44 |
| 2018 | 35 | 51 |
| 2019 | 37 | 40 |
| 2020 | 48 | 61 |
| 2021 | 45 | 62 |
| 2022 | 37 | 43 |
| 2023 | 40 | 61 |
| 2024 | 42 | 44 |
| 2025 | 25 | 51 |
| 2026 | 18 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aqueous formulation of oil-soluble corrosion inhibitor, and preparation method and regeneration method thereof22 Sep 2026US 12,742,119 B2PetroChina Company Limited
- Wastewater processing system and apparatus8 Sep 2026US 12,729,138 B2Skagen Energy Services Inc.
- Extended- and multimodal-release compositions25 Aug 2026US 12,715,801 B2Finoric, LLC
- Method for utilizing multiple simultaneous independent sources of water in a cooling tower28 Jul 2026US 12,692,175 B2Ecolab USA Inc.
- Method of inhibiting corrosion of a metal in an industrial water system21 Jul 2026US 12,686,929 B2Ecolab USA Inc.
- Utilization of an ultra-high pressure reverse osmosis membrane system to treat industrial wastewater or a reverse osmosis reject waste stream8 Oct 2026US 2026/0308017 A1Renovo Resources LLC
- Method for Complete Sulfate and Metal Removal from Produced Water Using a Three-Step Treatment Process for Reinjection8 Oct 2026US 2026/0308034 A1Molecular Filtration, Inc.
- Method of Inhibiting Corrosion of a Metal in an Industrial Water System1 Oct 2026US 2026/0297758 A1Ecolab USA Inc.
- Multifunctional-group modified green scale inhibitor for efficient inhibiting calcium sulfate formation and preparation method and application thereof24 Sep 2026US 2026/0285724 A1Nanjing University
- Water treatment systems and methods10 Sep 2026US 2026/0265104 A1Nuvo Residential, LLC DBA NuvoH2O
Most cited
By later US patents
- Use of crystalline layered sodium silicates for softening water and a process for softening water187US 4,664,839 AHoechst Aktiengesellschaft · 1987
- System and method for detecting time-bomb malware168US 9,536,091 B2FireEye, Inc. · 2017
- System and method for detecting time-bomb malware153US 10,083,302 B1FireEye, Inc. · 2018
- Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers144US 4,640,793 ACalgon Corporation · 1987
- Washing and cleaning agent containing surfactants, builder, and crystalline layered sodium silicate140US 4,820,439 AHoechst Aktiengesellschaft · 1989