Treatment method for full resource recovery from sludge in municipal wastewater treatment plants
US-2026042692-A1 · Feb 12, 2026 · US
Sludge detoxification
Sludge detoxification · 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 | C02F11/004 |
| Official title | {Sludge detoxification} |
| Display label | Sludge detoxification |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for promoting methane production from sludge by anaerobic digestion in high ammonia-nitrogen habitat using biochar with high C/N ratio
US-12421149-B2 · Sep 23, 2025 · US
Disinfectant-dosing microgel and method of using the same
US-2025234866-A1 · Jul 24, 2025 · US
Equipment for in-situ restoration of sediment
US-12356908-B2 · Jul 15, 2025 · US
Method of sludge pretreatment for improved digestibility and reduced scaling
US-2024425400-A1 · Dec 26, 2024 · US
Method of reducing and controlling hazardous substance in process of high-value biological conversion of urban organic waste
US-12122696-B2 · Oct 22, 2024 · US
Remediation method and system for deep-sea mine tailings
US-12077457-B2 · Sep 3, 2024 · US
Toxic Waste Treatment Process And Treatment Apparatus
US-2024116791-A1 · Apr 11, 2024 · US
System and method for low-temperature treatment of heavy metals and dioxins in fly ash
US-2023398587-A1 · Dec 14, 2023 · US
Method for promoting methane production from sludge by anaerobic digestion in high ammonia-nitrogen habitat using biochar with high c/n ratio
US-2023357066-A1 · Nov 9, 2023 · US
Method for treating sludge using solar thermal concentrators
US-2023093562-A1 · Mar 23, 2023 · US
Modified zeolite for heavy metal removal
US-2022323929-A1 · Oct 13, 2022 · US
Method of reducing and controlling hazardous substance in process of high-value biological conversion of urban organic waste
US-2022234932-A1 · Jul 28, 2022 · US
Disinfectant-dosing microgel and method of using the same
US-2022071216-A1 · Mar 10, 2022 · US
Remediation method and system for deep-sea mine tailings
US-2021323841-A1 · Oct 21, 2021 · US
Method for removing antibiotic resistance gene by using ionizing radiation
US-2021162475-A1 · Jun 3, 2021 · US
Biomass selection and control for continuous flow granular/flocculent activated sludge processes
US-10781125-B2 · Sep 22, 2020 · US
Emulsion-type water-based detergent for oily sludge, preparation method and use method thereof
US-2020123478-A1 · Apr 23, 2020 · US
Biomass selection and control for continuous flow granular/flocculent activated sludge processes
US-2020048131-A1 · Feb 13, 2020 · US
Methods and systems for pH treatment and extraction of leachable resources and pollutants from sludge
US-10315943-B2 · Jun 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F11/004?
- CPC C02F11/004 is the Cooperative Patent Classification code for “Sludge detoxification.”
- How many patents are filed under CPC C02F11/004 (Sludge detoxification)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC C02F11/004 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).