Two-phase sulfate reduction device and treatment method for preventing sludge calcification
US-2025353766-A1 · Nov 20, 2025 · US
for biological oxidation or reduction of sulfur compounds
for biological oxidation or reduction of sulfur compounds · 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 | C02F3/345 |
| Official title | {for biological oxidation or reduction of sulfur compounds} |
| Display label | for biological oxidation or reduction of sulfur compounds |
| Total patents | 64 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 9 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 8 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method of separating oxygen from a body of water
US-12428328-B2 · Sep 30, 2025 · US
Integrated synchronous nitrogen and sulfur removal device and wastewater treatment method
US-2025154037-A1 · May 15, 2025 · US
System and method of high efficacy two-stage metal treatment incorporating basic oxygen furnace slag and microbial sulfate reduction
US-2025074803-A1 · Mar 6, 2025 · US
External acceleration system for biological denitrification process during wastewater treatment
US-2025042791-A1 · Feb 6, 2025 · US
Ferric iron-dosed anaerobic biological wastewater treatment technology
US-12168623-B2 · Dec 17, 2024 · US
Environmental-friendly Process for the Treatment of Wastewater
US-2024294410-A1 · Sep 5, 2024 · US
Biological wastewater processing system and method for processing the same
US-2024217852-A1 · Jul 4, 2024 · US
Method for biofilm dispersal
US-11707065-B2 · Jul 25, 2023 · US
Addition of alkaline materials to biotrickling filter or bio-filter make-up water
US-2023075149-A1 · Mar 9, 2023 · US
Processes for treatment of wastewater
US-11577979-B1 · Feb 14, 2023 · US
Processes for treatment of wastewater
US-2023034944-A1 · Feb 2, 2023 · US
Multivalent iron bio-inhibitor from waste bauxite residue to control reservoir souring
US-11535790-B2 · Dec 27, 2022 · US
Ferric Iron-Dosed Anaerobic Biological Wastewater Treatment Technology
US-2022332615-A1 · Oct 20, 2022 · US
Addition of alkaline materials to biotrickling filter or bio-filter make-up water
US-11420161-B2 · Aug 23, 2022 · US
Method and device for treating ammonia-nitrogen wastewater using microbial electrolysis cell assisted SANI system
US-11401185-B2 · Aug 2, 2022 · US
System and Method of Separating Oxygen from A Body of Water
US-2022194833-A1 · Jun 23, 2022 · US
System and Method of Generating Electricity in A Body of Water
US-2022200029-A1 · Jun 23, 2022 · US
System and Method of Generating Hydrogen Gas
US-2022194786-A1 · Jun 23, 2022 · US
Multivalent iron bio-inhibitor from waste bauxite residue to control reservoir souring
US-2022073808-A1 · Mar 10, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/345?
- CPC C02F3/345 is the Cooperative Patent Classification code for “for biological oxidation or reduction of sulfur compounds.”
- How many patents are filed under CPC C02F3/345 (for biological oxidation or reduction of sulfur compounds)?
- Our database includes 64 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/345 growing?
- Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).