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 | C02F1/441 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 1,949 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 123 |
| 2016 | 118 |
| 2017 | 162 |
| 2018 | 181 |
| 2019 | 233 |
| 2020 | 198 |
| 2021 | 172 |
| 2022 | 179 |
| 2023 | 184 |
| 2024 | 185 |
| 2025 | 166 |
| 2026 | 48 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus and method for green hydrogen production using submerged desalination system
US-2024318323-A1 · Sep 26, 2024 · US
Reverse osmosis system
US-2024278178-A1 · Aug 22, 2024 · US
Porous membranes for high pressure filtration
US-12064731-B2 · Aug 20, 2024 · US
System and method for recovering nutrients from a high nitrogenous liquid waste
US-2024083791-A1 · Mar 14, 2024 · US
Grey water system
US-2024051852-A1 · Feb 15, 2024 · US
Preparation method of reverse osmosis composite membrane and reverse osmosis composite membrane prepared thereby
US-2024024827-A1 · Jan 25, 2024 · US
Pervaporation membrane and method for concentrating phenols
US-2015367292-A1 · Dec 24, 2015 · US
Application of rejection enhancing agents (REAs) that do not have cloud point limitations on desalination membranes
US-9216385-B2 · Dec 22, 2015 · US
Reverse osmosis membrane for wastewater treatment
US-9211509-B2 · Dec 15, 2015 · US
Water treatment method
US-2015344339-A1 · Dec 3, 2015 · US
Composite semipermeable membrane
US-2015343393-A1 · Dec 3, 2015 · US
Method of treatment of radioactive wastewater
US-2015336815-A1 · Nov 26, 2015 · US
Water treatment device
US-2015299016-A1 · Oct 22, 2015 · US
Modified thin film composite reverse osmosis membrane and a process for preparation thereof
US-2015290595-A1 · Oct 15, 2015 · US
Composite semipermeable membrane and composite semipermeable membrane element
US-2015283515-A1 · Oct 8, 2015 · US
Membranes with improved flux and method for their preparation
US-2015274891-A1 · Oct 1, 2015 · US
Seawater desalination apparatus
US-9145310-B2 · Sep 29, 2015 · US
Method of inhibiting scale formation and deposition in desalination systems
US-9133046-B2 · Sep 15, 2015 · US
Seawater desalination plant system
US-9120688-B2 · Sep 1, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/441?
- CPC C02F1/441 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F1/441 (Chemistry & Metallurgy)?
- Our database includes 1,949 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/441 growing?
- Publication counts under this code: 185 in 2024 vs 166 in 2025 (latest complete years).