Water treatment method and water treatment apparatus
US-2024383788-A1 · Nov 21, 2024 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C02F9/00 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 1,613 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 97 |
| 2016 | 105 |
| 2017 | 124 |
| 2018 | 126 |
| 2019 | 142 |
| 2020 | 140 |
| 2021 | 153 |
| 2022 | 169 |
| 2023 | 176 |
| 2024 | 176 |
| 2025 | 149 |
| 2026 | 56 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water Treatment Unit Comprising a Plurality of Filtration Devices
US-2024308884-A1 · Sep 19, 2024 · US
Medicament Preparation and Treatment Devices, Methods, and Systems
US-2024277909-A1 · Aug 22, 2024 · US
Method and system for pre-treating high strength wastewater
US-2024182343-A1 · Jun 6, 2024 · US
Straight-line sewage treatment system for enhanced treatment of low c/n domestic sewage
US-2024092664-A1 · Mar 21, 2024 · US
Saline wastewater treatment system using solar-assisted heat pump
US-2024083794-A1 · Mar 14, 2024 · US
System and method for recovering nutrients from a high nitrogenous liquid waste
US-2024083791-A1 · Mar 14, 2024 · US
Air pollution control system and air pollution control method
US-2015375166-A1 · Dec 31, 2015 · US
Selective scaling in desalination water treatment systems and associated methods
US-9221694-B1 · Dec 29, 2015 · US
Method and system for sludge treatment
US-2015360986-A1 · Dec 17, 2015 · US
Water recovery system for use in confined spaces
US-2015353401-A1 · Dec 10, 2015 · US
Water treatment method
US-2015344339-A1 · Dec 3, 2015 · US
Water treatment system
US-2015336829-A1 · Nov 26, 2015 · US
Method of treating treatment object containing harmful compound
US-9187353-B2 · Nov 17, 2015 · US
Water production method
US-2015321934-A1 · Nov 12, 2015 · US
Method of oxidising production water
US-2015321935-A1 · Nov 12, 2015 · US
Apparatus and process for treatment of water
US-9180411-B2 · Nov 10, 2015 · US
Treatment of municipal wastewater with anaerobic digestion
US-9181120-B2 · Nov 10, 2015 · US
Method for removing cesium ions in aqueous solution employing magnetic particles
US-2015315053-A1 · Nov 5, 2015 · US
Water treatment device
US-2015299016-A1 · Oct 22, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F9/00?
- CPC C02F9/00 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F9/00 (Chemistry & Metallurgy)?
- Our database includes 1,613 publications tagged with this CPC code.
- Is patent activity under CPC C02F9/00 growing?
- Publication counts under this code: 176 in 2024 vs 149 in 2025 (latest complete years).