Method of controlling a wastewater treatment plant
US-12534391-B2 · Jan 27, 2026 · US
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N2O
N2O · 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 | C02F2209/34 |
| Official title | N2O |
| Display label | N2O |
| Total patents | 10 |
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 | 3 |
| 2017 | 1 |
| 2019 | 3 |
| 2021 | 1 |
| 2023 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for controlling nitrous oxide production in wastewater treatment facilities
US-2023202889-A1 · Jun 29, 2023 · US
Method of controlling a wastewater treatment plant
US-2021094851-A1 · Apr 1, 2021 · US
System for neutralizing the pH of exhaust condensate
US-10501337-B2 · Dec 10, 2019 · US
System For Neutralizing The PH Of Exhaust Condensate
US-2019308886-A1 · Oct 10, 2019 · US
Sequencing batch facility and method for reducing the nitrogen content in waste water
US-10259732-B2 · Apr 16, 2019 · US
Sequencing batch facility and method for reducing the nitrogen content in waste water
US-2017225988-A1 · Aug 10, 2017 · US
Microbial production of nitrous oxide coupled with chemical reaction of gaseous nitrous oxide
US-8932848-B2 · Jan 13, 2015 · US
Microbial production of nitrous oxide coupled with chemical reaction of gaseous nitrous oxide including phosphorus recovery and nitrite reduction to nitrous oxide
US-8932849-B2 · Jan 13, 2015 · US
Microbial production of nitrous oxide coupled with chemical reaction of gaseous nitrous oxide
US-8932847-B2 · Jan 13, 2015 · US