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 | C02F1/44 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 1,592 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 110 |
| 2016 | 117 |
| 2017 | 133 |
| 2018 | 166 |
| 2019 | 174 |
| 2020 | 168 |
| 2021 | 165 |
| 2022 | 138 |
| 2023 | 113 |
| 2024 | 138 |
| 2025 | 135 |
| 2026 | 35 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Medicament Preparation and Treatment Devices, Methods, and Systems
US-2024277909-A1 · Aug 22, 2024 · US
Method for constructing dynamic-like membrane to control membrane fouling of mbr
US-2024067545-A1 · Feb 29, 2024 · US
System and method for filtering
US-9212071-B2 · Dec 15, 2015 · US
Polyamide water-treatment separation membrane having properties of high salt rejection and high flux and manufacturing method thereof
US-2015352501-A1 · Dec 10, 2015 · US
Total chlorine water detection system and method for medical fluid treatments
US-2015335808-A1 · Nov 26, 2015 · US
Superhydrophilic and oleophobic porous materials and methods for making and using the same
US-9186631-B2 · Nov 17, 2015 · US
Carbon nanotube ponytails
US-2015321168-A1 · Nov 12, 2015 · US
Water production method
US-2015321934-A1 · Nov 12, 2015 · US
Method of oxidising production water
US-2015321935-A1 · Nov 12, 2015 · US
Systems and Methods for Reducing Ammonia Emissions from Liquid Effluents and for Recovering the Ammonia
US-2015307369-A1 · Oct 29, 2015 · US
Filtration systems and methods for filtering solids
US-2015306525-A1 · Oct 29, 2015 · US
System for cleaning membrane, and method for cleaning membrane using same
US-2015306544-A1 · Oct 29, 2015 · US
Composite polyamide membrane made using substituted benzamide monomer
US-2015298066-A1 · Oct 22, 2015 · US
System and method for filtration
US-2015298996-A1 · Oct 22, 2015 · US
Method and Device for Obtaining Purified Water
US-2015298997-A1 · Oct 22, 2015 · US
Separation membrane and separation membrane element
US-2015298064-A1 · Oct 22, 2015 · US
Aeration device, operation method therefor, and water treatment apparatus
US-2015290590-A1 · Oct 15, 2015 · US
Curable Compositions and Membranes
US-2015290594-A1 · Oct 15, 2015 · US
Hollow porous membrane
US-2015283517-A1 · Oct 8, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/44?
- CPC C02F1/44 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F1/44 (Chemistry & Metallurgy)?
- Our database includes 1,592 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/44 growing?
- Publication counts under this code: 138 in 2024 vs 135 in 2025 (latest complete years).