Straight-line sewage treatment system for enhanced treatment of low c/n domestic sewage
US-2024092664-A1 · Mar 21, 2024 · US
Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD] · 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 | C02F2209/08 |
| Official title | Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD] |
| Display label | Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD] |
| Total patents | 270 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 13 |
| 2017 | 23 |
| 2018 | 19 |
| 2019 | 24 |
| 2020 | 23 |
| 2021 | 37 |
| 2022 | 34 |
| 2023 | 23 |
| 2024 | 27 |
| 2025 | 27 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for processing contaminated wastewater from the preparation of isophorone, isophoronenitrile and isophoronediamine
US-10144662-B2 · Dec 4, 2018 · US
Cod abatement process for electrochemical oxidation
US-10144659-B2 · Dec 4, 2018 · US
Method for forming aerobic granules, device for forming aerobic granules, method for treating wastewater, and device for treating wastewater
US-2018339925-A1 · Nov 29, 2018 · US
Method for reducing chemical oxygen demand of wastewater from preparation of 2-ethylhexanol
US-2018327290-A1 · Nov 15, 2018 · US
Water treatment apparatus and water treatment method
US-10035718-B2 · Jul 31, 2018 · US
Measuring Phosphorus in Wastewater Using a Self-Organizing RBF Neural Network
US-2018164272-A1 · Jun 14, 2018 · US
Method of treating wastewater
US-2018155224-A1 · Jun 7, 2018 · US
Systems and methods for continuous measurement of an analyte
US-2018148360-A1 · May 31, 2018 · US
A Method for Effluent Total Nitrogen-based on a Recurrent Self-organizing RBF Neural Network
US-2018029900-A1 · Feb 1, 2018 · US
Systems and methods for treating dilute wastewater
US-2018016171-A1 · Jan 18, 2018 · US
Water treatment apparatus and water treatment method
US-2017362107-A1 · Dec 21, 2017 · US
Treatment of municipal wastewater with anaerobic digestion
US-9845260-B2 · Dec 19, 2017 · US
Method of controlling addition rate of an odor control chemical
US-9815718-B2 · Nov 14, 2017 · US
Method for managing a wastewater treatment process
US-2017297937-A1 · Oct 19, 2017 · US
Method for treating wastewater
US-2017297930-A1 · Oct 19, 2017 · US
Water treatment method
US-2017274325-A1 · Sep 28, 2017 · US
Processes and apparatuses for removal of carbon, phosphorus and nitrogen
US-9771281-B2 · Sep 26, 2017 · US
Side Stream Treatment for Overflow
US-2017247274-A1 · Aug 31, 2017 · US
Method and system for wastewater treatment based on dissolved oxygen control by fuzzy neural network
US-9747544-B2 · Aug 29, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2209/08?
- CPC C02F2209/08 is the Cooperative Patent Classification code for “Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD].”
- How many patents are filed under CPC C02F2209/08 (Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD])?
- Our database includes 270 publications tagged with this CPC code.
- Is patent activity under CPC C02F2209/08 growing?
- Publication counts under this code: 27 in 2024 vs 27 in 2025 (latest complete years).