Biological nitrogen removal method based on multistage feeding and multistage anoxic/aerobic chambers for wastewater treatment at low temperature
US-2022306504-A1 · Sep 29, 2022 · US
N03-N
N03-N · 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 | C02F2209/15 |
| Official title | N03-N |
| Display label | N03-N |
| Total patents | 120 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 15 |
| 2021 | 15 |
| 2022 | 16 |
| 2023 | 18 |
| 2024 | 12 |
| 2025 | 16 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Intelligent Detection System of Effluent Total Nitrogen based on Fuzzy Transfer Learning Algorithm
US-2022267169-A1 · Aug 25, 2022 · US
Predictive model for water quality deterioration
US-2022260547-A1 · Aug 18, 2022 · US
Real-time management of device maintenance
US-2022263740-A1 · Aug 18, 2022 · US
Total Nitrogen Intelligent Detection Method Based on Multi-objective Optimized Fuzzy Neural Network
US-2022082545-A1 · Mar 17, 2022 · US
Treatment of wastewater
US-11208339-B2 · Dec 28, 2021 · US
Data-knowledge driven optimal control method for municipal wastewater treatment process
US-2021395120-A1 · Dec 23, 2021 · US
Partial nitrification-denitrification coupled two-stage autotrophic denitrification advanced nitrogen removal method
US-11203541-B2 · Dec 21, 2021 · US
Anammox reactor and water treatment method using the same
US-11180393-B2 · Nov 23, 2021 · US
Design of Aerobic Granular Sludge in Continuous Flow Reactors
US-2021355010-A1 · Nov 18, 2021 · US
Process and apparatus for dosing nutrients to a bioreactor
US-11130692-B2 · Sep 28, 2021 · US
Method for preparing simultaneous nitrogen and phosphorus removal lightweight material and the use thereof
US-11123670-B2 · Sep 21, 2021 · US
Methods of recovering platinum group metals from waste streams
US-2021179463-A1 · Jun 17, 2021 · US
Self contained, automatic water quality monitoring and treatment system
US-2021147256-A1 · May 20, 2021 · US
Water treatment plant and method for operating water treatment plant
US-2021133575-A1 · May 6, 2021 · US
Method of controlling a wastewater treatment plant
US-2021094851-A1 · Apr 1, 2021 · US
Side Stream Treatment for Overflow
US-2021087086-A1 · Mar 25, 2021 · US
Method for building predictive model of microorganism-derived dissolved organic nitrogen in wastewater
US-2021081587-A1 · Mar 18, 2021 · US
Water treatment method and water treatment device
US-2021061691-A1 · Mar 4, 2021 · US
Water treatment apparatus for removing nitrogen contained in raw water and water treatment method using the same
US-10927024-B2 · Feb 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2209/15?
- CPC C02F2209/15 is the Cooperative Patent Classification code for “N03-N.”
- How many patents are filed under CPC C02F2209/15 (N03-N)?
- Our database includes 120 publications tagged with this CPC code.
- Is patent activity under CPC C02F2209/15 growing?
- Publication counts under this code: 12 in 2024 vs 16 in 2025 (latest complete years).