Stormwater biofiltration system and method
US-11927007-B2 · Mar 12, 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 | C02F3/327 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 127 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 8 |
| 2021 | 25 |
| 2022 | 14 |
| 2023 | 16 |
| 2024 | 15 |
| 2025 | 8 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for ecologic configuration of oil production high-salt wastewater artificial wetland to realize up-to-standard operation in winter
US-2021403355-A1 · Dec 30, 2021 · US
Subsurface flow constructed wetland and method of using the same for wastewater treatment
US-11186506-B2 · Nov 30, 2021 · US
System for preventing and controlling heavy metals and method for preventing and controlling heavy metals using the same
US-11174182-B2 · Nov 16, 2021 · US
Method and device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas
US-11174184-B2 · Nov 16, 2021 · US
Method and device for treating cyanobacteria in water area based on biological competition principle
US-2021340045-A1 · Nov 4, 2021 · US
Method for stopping swimming or crawling of adhesion-stage larvae
US-11140893-B2 · Oct 12, 2021 · US
Method for killing Pteriomorphia and barnacles using light irradiation
US-11134669-B2 · Oct 5, 2021 · US
Method for NR Radio Link Monitoring (RLM) and Evaluation Period Determination
US-2021258098-A1 · Aug 19, 2021 · US
Method and device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage
US-2021188677-A1 · Jun 24, 2021 · US
Method and device for preventing and controlling pollutants in basin water resource utilization
US-2021171379-A1 · Jun 10, 2021 · US
Method and device for controlling pollutants in metal mine water resources cycling utilization
US-2021171380-A1 · Jun 10, 2021 · US
Systems and methods for stormwater management
US-2021147254-A1 · May 20, 2021 · US
Method for changing filler pollutant accumulation of constructed wetland
US-10968124-B2 · Apr 6, 2021 · US
System for preventing and controlling heavy metals and method for preventing and controlling heavy metals using the same
US-2020399157-A1 · Dec 24, 2020 · US
Method and device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas
US-2020392027-A1 · Dec 17, 2020 · US
Subsurface flow constructed wetland and method of using the same for wastewater treatment
US-2020290907-A1 · Sep 17, 2020 · US
Earthworm Reactor of Frame Composite Structure and Method of Treating Sludge thereby
US-2020283322-A1 · Sep 10, 2020 · US
Method for detecting clogging of subsurface flow constructed wetland
US-10684241-B2 · Jun 16, 2020 · US
Use of proteins to control molluscs
US-10667525-B2 · Jun 2, 2020 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/327?
- CPC C02F3/327 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F3/327 (Chemistry & Metallurgy)?
- Our database includes 127 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/327 growing?
- Publication counts under this code: 15 in 2024 vs 8 in 2025 (latest complete years).