Method for treating hexavalent chromium-containing aqueous solution
US-9802841-B2 · Oct 31, 2017 · US
by reduction {(C02F1/4676 takes precedence)}
by reduction {(C02F1/4676 takes precedence)} · 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 | C02F1/70 |
| Official title | by reduction {(C02F1/4676 takes precedence)} |
| Display label | by reduction {(C02F1/4676 takes precedence)} |
| Total patents | 271 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 29 |
| 2016 | 25 |
| 2017 | 26 |
| 2018 | 22 |
| 2019 | 20 |
| 2020 | 22 |
| 2021 | 31 |
| 2022 | 26 |
| 2023 | 23 |
| 2024 | 22 |
| 2025 | 19 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for nitrogen removal from aqueous medium
US-2017275192-A1 · Sep 28, 2017 · US
Water production method
US-2017266618-A1 · Sep 21, 2017 · US
Method and system for providing ultrapure water
US-9764968-B2 · Sep 19, 2017 · US
Subsea Deoxygenation In A Water Injection Process Plant
US-2017253506-A1 · Sep 7, 2017 · US
Process for recovering elemental selenium from wastewater
US-2017158535-A1 · Jun 8, 2017 · US
Synergistically active mixture for use as an oxygen binder and as a corrosion inhibitor in aqueous systems
US-2016376711-A1 · Dec 29, 2016 · US
Process for removal of radioactive contamination from wastewater
US-9527756-B2 · Dec 27, 2016 · US
Composition for treatment of ballast water
US-9505640-B2 · Nov 29, 2016 · US
Methods and systems for selenocyanate removal from contaminated aqueous media
US-2016311711-A1 · Oct 27, 2016 · US
Methods for scavenging nitric oxide using cerium oxide nanoparticles
US-9463437-B2 · Oct 11, 2016 · US
Methods of maintaining the concentration of at least one oxygen species within a water-based stream
US-2016289088-A1 · Oct 6, 2016 · US
Wastewater treatment method and wastewater treatment apparatus
US-2016251241-A1 · Sep 1, 2016 · US
Hydrophobically modified polyamine scale inhibitors
US-2016221850-A1 · Aug 4, 2016 · US
Multifunctional method for membrane protection and biofouling control
US-2016185630-A1 · Jun 30, 2016 · US
Green synthesis nanocomposite membranes
US-9375684-B2 · Jun 28, 2016 · US
Hydrophobically modified polyamine scale inhibitors
US-9365442-B2 · Jun 14, 2016 · US
Treatment process of phosphorous pentafluoride
US-2016158696-A1 · Jun 9, 2016 · US
Method and device for preventing corrosion in hot water systems
US-9352980-B2 · May 31, 2016 · US
Use of peracetic acid/hydrogen peroxide and peroxide-reducing agents for treatment of drilling fluids, frac fluids, flowback water and disposal water
US-2016137535-A1 · May 19, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/70?
- CPC C02F1/70 is the Cooperative Patent Classification code for “by reduction {(C02F1/4676 takes precedence)}.”
- How many patents are filed under CPC C02F1/70 (by reduction {(C02F1/4676 takes precedence)})?
- Our database includes 271 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/70 growing?
- Publication counts under this code: 22 in 2024 vs 19 in 2025 (latest complete years).