Oxidizing compositions for removing sulfur compounds from hydrocarbon fuels and wastewater
US-2024400426-A1 · Dec 5, 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 | C02F1/20 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 698 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 54 |
| 2016 | 37 |
| 2017 | 58 |
| 2018 | 71 |
| 2019 | 59 |
| 2020 | 71 |
| 2021 | 58 |
| 2022 | 55 |
| 2023 | 76 |
| 2024 | 70 |
| 2025 | 67 |
| 2026 | 22 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water treatment method and water treatment apparatus
US-2024383788-A1 · Nov 21, 2024 · US
Medicament Preparation and Treatment Devices, Methods, and Systems
US-2024277909-A1 · Aug 22, 2024 · US
Forward osmosis device, and forward osmosis method
US-2016236951-A1 · Aug 18, 2016 · US
Process for treating liquid effluents and recovering metals
US-9410223-B2 · Aug 9, 2016 · US
Water treatment device and water treatment method
US-2016145132-A1 · May 26, 2016 · US
Methods and systems for treating produced water
US-2015376033-A1 · Dec 31, 2015 · US
Processing liquid supply method, processing liquid supply apparatus and storage medium
US-2015367266-A1 · Dec 24, 2015 · US
Method and system for sludge treatment
US-2015360986-A1 · Dec 17, 2015 · US
Method for improving the percent recovery and water quality in high total hardness water
US-2015360988-A1 · Dec 17, 2015 · US
Water recovery system for use in confined spaces
US-2015353401-A1 · Dec 10, 2015 · US
Ultrapure water producting apparatus
US-2015336813-A1 · Nov 26, 2015 · US
Processing device and processing method for hydrogen-sulphide-containing barren solution
US-2015329379-A1 · Nov 19, 2015 · US
Nutrient recovery process
US-2015329399-A1 · Nov 19, 2015 · US
Fluid purification system
US-2015328386-A1 · Nov 19, 2015 · US
Method for reducing organic impurities in waste water
US-2015329389-A1 · Nov 19, 2015 · US
Pressure-Less Ozonated DI-Water (DIO3) Recirculation Reclaim System
US-2015315037-A1 · Nov 5, 2015 · US
Systems and Methods for Reducing Ammonia Emissions from Liquid Effluents and for Recovering the Ammonia
US-2015307369-A1 · Oct 29, 2015 · US
Method for producing ozone gas-dissolved water and method for cleaning electronic material
US-2015303053-A1 · Oct 22, 2015 · US
Processing liquid supply method, processing liquid supply apparatus and storage medium
US-9162163-B2 · Oct 20, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/20?
- CPC C02F1/20 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F1/20 (Chemistry & Metallurgy)?
- Our database includes 698 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/20 growing?
- Publication counts under this code: 70 in 2024 vs 67 in 2025 (latest complete years).