Method for separating aromatic hydrocarbon using extractive distillation
US-11731922-B2 · Aug 22, 2023 · US
Counter-current extraction
Counter-current extraction · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D2011/002 |
| Official title | {Counter-current extraction} |
| Display label | Counter-current extraction |
| Total patents | 68 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 7 |
| 2017 | 14 |
| 2018 | 5 |
| 2019 | 10 |
| 2020 | 6 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for counter-current liquid-liquid extraction in a sub-millimetre conduit
US-2023191285-A1 · Jun 22, 2023 · US
Apparatus and process for treating biomass for on-site production of cellulolytic enzymes and method of using the enzymes to manufacture fuels and chemicals
US-11542532-B2 · Jan 3, 2023 · US
Extractor and related methods
US-11458415-B2 · Oct 4, 2022 · US
Apparatus and process for treating biomass for on-site production of cellulolytic enzymes and method of using the enzymes to manufacture fuels and chemicals
US-2022298531-A1 · Sep 22, 2022 · US
Methods and systems for production of furfural
US-2022194914-A1 · Jun 23, 2022 · US
Liquid-liquid extractor and battery comprising such extractors
US-2022105447-A1 · Apr 7, 2022 · US
Process to remove asphaltene from heavy oil by solvent
US-11248174-B2 · Feb 15, 2022 · US
Method and device for continuous countercurrent transfer of material between two fluid phases
US-2022016546-A1 · Jan 20, 2022 · US
Production method of polyvinyl alcohol resin, and polyvinyl alcohol resin
US-2021309770-A1 · Oct 7, 2021 · US
Process to remove asphaltene from heavy oil by solvent
US-2021198582-A1 · Jul 1, 2021 · US
Method for obtaining pure 1,3-butadiene
US-11034631-B2 · Jun 15, 2021 · US
Extractor And Related Methods
US-2021138360-A1 · May 13, 2021 · US
Method for separating aromatic hydrocarbon using extractive distillation
US-2021053893-A1 · Feb 25, 2021 · US
Extractor and related methods
US-10843103-B2 · Nov 24, 2020 · US
Method for obtaining pure 1,3-butadiene
US-2020339490-A1 · Oct 29, 2020 · US
Dispersed mobile-phase countercurrent chromatography
US-10675558-B2 · Jun 9, 2020 · US
Adjusting a fuel on-board a vehicle
US-10611238-B2 · Apr 7, 2020 · US
Process and device for producing polyamides, with optimized flow guidance
US-10584204-B2 · Mar 10, 2020 · US
Liquid-liquid contact device and liquid-liquid contact method
US-10561963-B2 · Feb 18, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2011/002?
- CPC B01D2011/002 is the Cooperative Patent Classification code for “Counter-current extraction.”
- How many patents are filed under CPC B01D2011/002 (Counter-current extraction)?
- Our database includes 68 publications tagged with this CPC code.
- Is patent activity under CPC B01D2011/002 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).