Method for liquid-solid separation
US-2026091996-A1 · Apr 2, 2026 · US
Viscosity
Viscosity · 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 | C02F2209/09 |
| Official title | Viscosity |
| Display label | Viscosity |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 6 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electrodialysis device for the desalination of water for oil and gas applications
US-12268993-B2 · Apr 8, 2025 · US
Controlling the rheology of a metal ore residue
US-12122884-B2 · Oct 22, 2024 · US
Systems and methods for uv treatment of a viscous fluid
US-2023380456-A1 · Nov 30, 2023 · US
Incinerator system for on-site completion fluid removal and methods of using the same
US-11827534-B2 · Nov 28, 2023 · US
Polyhydroxy multi-ionic compounds and methods of making and use thereof
US-2023339849-A1 · Oct 26, 2023 · US
Incinerator system for on-site completion fluid removal and methods of using the same
US-2023054521-A1 · Feb 23, 2023 · US
Method for controlling bio-slimes in a clean circulating water system through a physical-chemical-superconducting high gradient magnetic separation coupling process
US-11577975-B2 · Feb 14, 2023 · US
Incinerator system for on-site completion fluid removal and methods of using the same
US-11492269-B2 · Nov 8, 2022 · US
Method for processing sludge
US-11407668-B1 · Aug 9, 2022 · US
Incinerator system for on-site completion fluid removal and methods of using the same
US-2022055918-A1 · Feb 24, 2022 · US
Water purification dispersion, production method for water purification dispersion, and waste water treatment method
US-11161757-B2 · Nov 2, 2021 · US
Method for treating production water from a method for enhanced oil and/or gas recovery
US-11046601-B2 · Jun 29, 2021 · US
Method for controlling the sedimentation of a mining derivative
US-2021170309-A1 · Jun 10, 2021 · US
Controlling the rheology of a metal ore residue
US-2021171723-A1 · Jun 10, 2021 · US
Electrodialysis device for the desalination of water for oil and gas applications
US-2021069646-A1 · Mar 11, 2021 · US
Method for controlling bio-slimes in a clean circulating water system through a physical-chemical-superconducting high gradient magnetic separation coupling process
US-2021017051-A1 · Jan 21, 2021 · US
Apparatus for partially desalinating produced water to form extraction fluid used for fossil fuel extraction
US-10501344-B2 · Dec 10, 2019 · US
Water purification dispersion, production method for water purification dispersion, and waste water treatment method
US-2019359503-A1 · Nov 28, 2019 · US
Systems and methods for dosing earthen slurries with an additive to modify a fluid property of the slurry
US-2019330938-A1 · Oct 31, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2209/09?
- CPC C02F2209/09 is the Cooperative Patent Classification code for “Viscosity.”
- How many patents are filed under CPC C02F2209/09 (Viscosity)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C02F2209/09 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).