Method of processing liquid containing ammonia nitrogen from semiconductor fabrication machine
US-12459841-B2 · Nov 4, 2025 · US
by removing ammoniacal nitrogen (for biological methods C02F3/00)
by removing ammoniacal nitrogen (for biological methods C02F3/00) · 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 | C02F1/586 |
| Official title | {by removing ammoniacal nitrogen (for biological methods C02F3/00)} |
| Display label | by removing ammoniacal nitrogen (for biological methods C02F3/00) |
| Total patents | 59 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 23 |
| 2018 | 14 |
| 2019 | 13 |
| 2020 | 3 |
| 2022 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Aquavoltaic system and aquavoltaic method applied to the same
US-2025233546-A1 · Jul 17, 2025 · US
A water purification system and uses thereof
US-2024286930-A1 · Aug 29, 2024 · US
Method of processing liquid containing ammonia nitrogen from semiconductor fabrication machine
US-2024043295-A1 · Feb 8, 2024 · US
Type-2 fuzzy neural network-based cooperative control method for wastewater treatment process
US-11530139-B2 · Dec 20, 2022 · US
Recovery and re-use of waste energy in industrial facilities
US-10801785-B2 · Oct 13, 2020 · US
Recovery and re-use of waste energy in industrial facilities
US-10767932-B2 · Sep 8, 2020 · US
Method and system for treating brine waste water
US-10669168-B2 · Jun 2, 2020 · US
Physico-chemical process for removal of nitrogen species from recirculated aquaculture systems
US-2019380313-A1 · Dec 19, 2019 · US
Systems for recovery and re-use of waste energy in crude oil refining facility and aromatics complex through simultaneous intra-plant integration and plants' thermal coupling
US-10502494-B2 · Dec 10, 2019 · US
Systems for recovery and re-use of waste energy in crude oil refining facility and aromatics complex
US-10502495-B2 · Dec 10, 2019 · US
Cooperative optimal control method and system for wastewater treatment process
US-2019359510-A1 · Nov 28, 2019 · US
Recovery and re-use of waste energy in industrial facilities
US-10480864-B2 · Nov 19, 2019 · US
Systems for recovery and re-use of waste energy in crude oil refining and aromatics complex
US-10443946-B2 · Oct 15, 2019 · US
Systems for recovery and re-use of waste energy in hydrocracking-based configuration for integrated crude oil refining and aromatics complex
US-10436517-B2 · Oct 8, 2019 · US
Recovery and re-use of waste energy in industrial facilities
US-10429135-B2 · Oct 1, 2019 · US
Method and apparatus for treating urea aqueous solution
US-10280094-B2 · May 7, 2019 · US
Recovery and re-use of waste energy in industrial facilities
US-2019072337-A1 · Mar 7, 2019 · US
Recovery and re-use of waste energy in industrial facilities
US-2019072336-A1 · Mar 7, 2019 · US
Production of red iron oxide pigment
US-10221326-B2 · Mar 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/586?
- CPC C02F1/586 is the Cooperative Patent Classification code for “by removing ammoniacal nitrogen (for biological methods C02F3/00).”
- How many patents are filed under CPC C02F1/586 (by removing ammoniacal nitrogen (for biological methods C02F3/00))?
- Our database includes 59 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/586 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).