Straight-line sewage treatment system for enhanced treatment of low c/n domestic sewage
US-2024092664-A1 · Mar 21, 2024 · US
Biological phosphorus removal
Biological phosphorus removal · 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 | C02F3/308 |
| Official title | {Biological phosphorus removal} |
| Display label | Biological phosphorus removal |
| Total patents | 131 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 7 |
| 2020 | 11 |
| 2021 | 23 |
| 2022 | 13 |
| 2023 | 12 |
| 2024 | 17 |
| 2025 | 12 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for recovering nutrients from a high nitrogenous liquid waste
US-2024083791-A1 · Mar 14, 2024 · US
Biomass Selection and Control for Continuous Flow Granular/Flocculent Activated Sludge Processes
US-2021380442-A1 · Dec 9, 2021 · US
Biomass Selection and Control for Continuous Flow Granular/Flocculent Activated Sludge Processes
US-2021380441-A1 · Dec 9, 2021 · US
Biomass Selection and Control for Continuous Flow Granular/Flocculent Activated Sludge Processes
US-2021380443-A1 · Dec 9, 2021 · US
Mainstream Deammonification Process Employing Bypass Primary Effluent and Step Feeding
US-2021355012-A1 · Nov 18, 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 preventing and controlling pollutants in basin water resource utilization
US-2021171379-A1 · Jun 10, 2021 · US
Culture systems and methods of using same
US-2021024861-A1 · Jan 28, 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
Reactor and method for biological treatment of wastewater
US-2020346958-A1 · Nov 5, 2020 · US
Wastewater treatment system using anaerobic ammonium oxidation in mainstream
US-2020325051-A1 · Oct 15, 2020 · US
Coagulant composition for wastewater treatment
US-2020299157-A1 · Sep 24, 2020 · US
Process and facility for recovering phosphorus at a wastewater treatment plant with advanced sludge treatment
US-10773983-B2 · Sep 15, 2020 · US
Biological removal of micropollutants from wastewater
US-10662098-B2 · May 26, 2020 · US
Method of upgrading the activated sludge process based on functional suspended carriers in the wastewater biological treatment process
US-2020156975-A1 · May 21, 2020 · US
Method for a water treatment in a system comprising at least one sequencing batch reactor and a moving bed biofilm reactor
US-2020095146-A1 · Mar 26, 2020 · US
Water treatment apparatus for removing nitrogen contained in raw water and water treatment method using the same
US-2020079669-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/308?
- CPC C02F3/308 is the Cooperative Patent Classification code for “Biological phosphorus removal.”
- How many patents are filed under CPC C02F3/308 (Biological phosphorus removal)?
- Our database includes 131 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/308 growing?
- Publication counts under this code: 17 in 2024 vs 12 in 2025 (latest complete years).