Disk-Pack Turbine
US-2024001264-A1 · Jan 4, 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 | C02F1/38 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 316 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 29 |
| 2017 | 23 |
| 2018 | 38 |
| 2019 | 32 |
| 2020 | 27 |
| 2021 | 32 |
| 2022 | 34 |
| 2023 | 21 |
| 2024 | 29 |
| 2025 | 25 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of reducing industrial water use
US-9850154-B2 · Dec 26, 2017 · US
Tubular fluid purification apparatus
US-2017355622-A1 · Dec 14, 2017 · US
Method for removing calcium, barium, magnesium and strontium from frac flowback
US-9828262-B2 · Nov 28, 2017 · US
Systems and processes for treatment of solutions
US-9828270-B2 · Nov 28, 2017 · US
Apparatus and process for treating liquids containing chlorosilanes
US-9802837-B2 · Oct 31, 2017 · US
Composite media for water treatment processes and methods of using same
US-9782694-B2 · Oct 10, 2017 · US
Pipe-integrated oil well fluid or oilfield fluid separation apparatus, and method thereof
US-9776889-B2 · Oct 3, 2017 · US
Pressure Controlled Gas Flotation
US-2017267548-A1 · Sep 21, 2017 · US
Liquid quality device with weir
US-2017240438-A1 · Aug 24, 2017 · US
Centrifuge process for dewatering oil sands tailings
US-9656189-B2 · May 23, 2017 · US
Apparatus for evaporative concentration of water to be treated, which uses hot lime softening, and method for evaporative concentration of water using the same
US-2017088452-A1 · Mar 30, 2017 · US
Starch Settling Recovery System
US-2017081426-A1 · Mar 23, 2017 · US
Water treatment in at least one membrane filtration unit for assisted recovery of hydrocarbons
US-9540253-B2 · Jan 10, 2017 · US
Particle Separator
US-2016368788-A9 · Dec 22, 2016 · US
Water treatment system and method
US-2016367936-A1 · Dec 22, 2016 · US
Liquid treatment method and liquid treatment device used therein
US-9522829-B2 · Dec 20, 2016 · US
A fluid treatment system, a fluid processing apparatus and method of treating a mixture
US-2016361728-A1 · Dec 15, 2016 · US
Centrifugal solid-liquid separation device and water treatment device using same
US-2016355413-A1 · Dec 8, 2016 · US
Sulfate molecule removal through inorganic or divalent ion nuclei seeding
US-9505639-B2 · Nov 29, 2016 · US
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/38?
- CPC C02F1/38 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C02F1/38 (Chemistry & Metallurgy)?
- Our database includes 316 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/38 growing?
- Publication counts under this code: 29 in 2024 vs 25 in 2025 (latest complete years).