Integration of fermentation and gasification
US-2021371312-A1 · Dec 2, 2021 · US
Multistep treatment
Multistep treatment · 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 | C02F3/121 |
| Official title | {Multistep treatment} |
| Display label | Multistep treatment |
| Total patents | 86 |
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 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 4 |
| 2019 | 10 |
| 2020 | 16 |
| 2021 | 17 |
| 2022 | 9 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for treating and recycling waste slurry in bobbin paper production
US-11180390-B2 · Nov 23, 2021 · US
Process monitoring device, process monitoring method, and program
US-2021325842-A1 · Oct 21, 2021 · US
Integration of fermentation and gasification
US-11097967-B2 · Aug 24, 2021 · US
Combination of Captivator and Fixed Film Bioreactor Solutions
US-2021230032-A1 · Jul 29, 2021 · US
Treatment using fixed film processes and ballasted settling
US-2021230033-A1 · Jul 29, 2021 · US
Method for treating organic wastewater, and device for treating organc wastewater
US-2021179462-A1 · Jun 17, 2021 · US
Sewage/wastewater treatment system using granular activated sludge and membrane bio-reactor and sewage/wastewater treatment method using the same
US-10961141-B2 · Mar 30, 2021 · US
Method for producing an organic substance
US-2021054418-A1 · Feb 25, 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
Wastewater treatment method
US-2021047215-A1 · Feb 18, 2021 · US
Biofilm carrier media in moving bed biofilm reactor processes
US-2021047204-A1 · Feb 18, 2021 · US
Treatment using fixed film processes and ballasted settling
US-10919792-B2 · Feb 16, 2021 · US
High Solids Dissolved Air Flotation System and Methods
US-2021009451-A1 · Jan 14, 2021 · US
Organic wastewater treatment method and organic wastewater treatment device
US-10822260-B2 · Nov 3, 2020 · US
Biomass selection and control for continuous flow granular/flocculent activated sludge processes
US-10781125-B2 · Sep 22, 2020 · US
Method for treating and recycling waste slurry in bobbin paper production
US-2020270154-A1 · Aug 27, 2020 · US
Biological removal of micropollutants from wastewater
US-10662098-B2 · May 26, 2020 · US
Apparatus for sewage deep bed denitrification with high pollutant carrying capacity and low energy consumption, and method for running the same
US-10662097-B2 · May 26, 2020 · US
Integration of fermentation and gasification
US-2020156973-A1 · May 21, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/121?
- CPC C02F3/121 is the Cooperative Patent Classification code for “Multistep treatment.”
- How many patents are filed under CPC C02F3/121 (Multistep treatment)?
- Our database includes 86 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/121 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).