Saline wastewater treatment system using solar-assisted heat pump
US-2024083794-A1 · Mar 14, 2024 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C02F3/301 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 138 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 10 |
| 2017 | 14 |
| 2018 | 11 |
| 2019 | 8 |
| 2020 | 17 |
| 2021 | 14 |
| 2022 | 11 |
| 2023 | 13 |
| 2024 | 19 |
| 2025 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Biomass selection and control for continuous flow granular/flocculent activated sludge processes
US-10781125-B2 · Sep 22, 2020 · US
Methods and devices for performing reactions
US-10745305-B2 · Aug 18, 2020 · US
Iron filings-based green environmental media for nutrient removal and methods of use
US-2020223716-A1 · Jul 16, 2020 · US
Wastewater Treatment System and Method
US-2020189948-A1 · Jun 18, 2020 · US
Nitrogen removal method, nitrification-reaction promoting agent for water treatment, and water treatment method
US-10584046-B2 · Mar 10, 2020 · US
Methods and compositions for nitrogen removal using Feammox microorganisms
US-10479712-B2 · Nov 19, 2019 · US
Method for producing polyhydroxyalkanoic acid
US-2019330089-A1 · Oct 31, 2019 · US
Method for controlling a treatment apparatus arrangement, a treatment apparatus arrangement for a treatment plant as well as a treatment plant
US-10384963-B2 · Aug 20, 2019 · US
Partial bed backwashing for packed bed reactor
US-10364171-B2 · Jul 30, 2019 · US
Wastewater Treatment with In-Film Microbial Heating
US-2019225518-A1 · Jul 25, 2019 · US
Plug flow reactor with internal recirculation fluidized bed
US-10315176-B2 · Jun 11, 2019 · US
Internal sulfur cycling SANI (ISC-SANI) process for biological wastewater treatment
US-10301204-B2 · May 28, 2019 · US
Method for treating waste water and recovering resources in acrylic fiber production
US-2019127254-A1 · May 2, 2019 · US
Nitrogen removal method, nitrification-reaction promoting agent for water treatment, and water treatment method
US-2018305233-A1 · Oct 25, 2018 · US
Methods and devices for performing reactions
US-2018186669-A1 · Jul 5, 2018 · US
Operating method for membrane separation device and membrane separation device
US-10010834-B2 · Jul 3, 2018 · US
Fast biofilm formation method for organic filler during treatment of sewage with low c/n ratio
US-2018141843-A1 · May 24, 2018 · US
Wastewater treatment method and equipment using a dual-diffusion oxygen supply horizontal-flow biofilm
US-9957177-B2 · May 1, 2018 · US
Apparatus for sewage deep denitrification with high pollutant carrying capacity and low energy consumption, and method for running the same
US-2018099885-A1 · Apr 12, 2018 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/301?
- CPC C02F3/301 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F3/301 (Chemistry & Metallurgy)?
- Our database includes 138 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/301 growing?
- Publication counts under this code: 19 in 2024 vs 10 in 2025 (latest complete years).