Straight-line sewage treatment system for enhanced treatment of low c/n domestic sewage
US-2024092664-A1 · Mar 21, 2024 · US
Total nitrogen (tkN-N)
Total nitrogen (tkN-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 | C02F2209/16 |
| Official title | Total nitrogen (tkN-N) |
| Display label | Total nitrogen (tkN-N) |
| Total patents | 94 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 15 |
| 2021 | 14 |
| 2022 | 7 |
| 2023 | 7 |
| 2024 | 16 |
| 2025 | 9 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Dynamic multi-objective particle swarm optimization-based optimal control method for wastewater treatment process
US-2023259075-A1 · Aug 17, 2023 · US
Method for collaborative control of organic nitrogen and inorganic nitrogen in denitrification process
US-2023212045-A1 · Jul 6, 2023 · US
Device and method for treating urban domestic sewage based on two-stage combined process of partial denitrification-anammox
US-2023100166-A1 · Mar 30, 2023 · US
Intelligent Detection System of Effluent Total Nitrogen based on Fuzzy Transfer Learning Algorithm
US-2022267169-A1 · Aug 25, 2022 · US
System for biological nitrogen removal and negative carbon discharge from wastewater with low carbon-to-nitrogen ratio
US-2022177342-A1 · Jun 9, 2022 · US
Spatial and temporal feature-based method for measuring domestic wastewater effluent loadings
US-2022178902-A1 · Jun 9, 2022 · US
Method for evaluating removal of nitrogen-containing organic matter in wastewater
US-2022136998-A1 · May 5, 2022 · US
Method and apparatus for treating municipal sewage by AOA process via endogenous partial denitrification coupled with anammox in anoxic zone
US-11319230-B2 · May 3, 2022 · US
Water treatment method and water treatment apparatus
US-2022098075-A1 · Mar 31, 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
Partial nitrification-denitrification coupled two-stage autotrophic denitrification advanced nitrogen removal method
US-11203541-B2 · Dec 21, 2021 · US
Method for realizing rapid startup of denitrification biofilter
US-11168012-B2 · Nov 9, 2021 · US
Process monitoring device, process monitoring method, and program
US-2021325842-A1 · Oct 21, 2021 · US
Wastewater treatment with suspended growth and membrane aerated biofilm
US-2021253460-A1 · Aug 19, 2021 · US
Method and apparatus for treating municipal sewage by aoa process via endogenous partial denitrification coupled with anammox in anoxic zone
US-2021246057-A1 · Aug 12, 2021 · US
Method of measuring concentration of dissolved organic nitrogen in sewage
US-11014835-B2 · May 25, 2021 · US
Water treatment plant and method for operating water treatment plant
US-2021133575-A1 · May 6, 2021 · US
Charging device of circulating water utilization system and circulating-water utilization system
US-10997673-B2 · May 4, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2209/16?
- CPC C02F2209/16 is the Cooperative Patent Classification code for “Total nitrogen (tkN-N).”
- How many patents are filed under CPC C02F2209/16 (Total nitrogen (tkN-N))?
- Our database includes 94 publications tagged with this CPC code.
- Is patent activity under CPC C02F2209/16 growing?
- Publication counts under this code: 16 in 2024 vs 9 in 2025 (latest complete years).