Ketamine flow synthesis
US-2020299224-A1 · Sep 24, 2020 · US
Separation
Separation · 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 | C07C209/86 |
| Official title | Separation |
| Display label | Separation |
| Total patents | 138 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 14 |
| 2017 | 6 |
| 2018 | 17 |
| 2019 | 8 |
| 2020 | 19 |
| 2021 | 8 |
| 2022 | 11 |
| 2023 | 10 |
| 2024 | 14 |
| 2025 | 17 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for extracting 1,5-pentanediamine from solution system containing 1,5-pentanediamine salt
US-10759737-B2 · Sep 1, 2020 · US
Process to convert the cyclic monourea of an ethylene amine compound into the ethylene amine compound
US-2020223785-A1 · Jul 16, 2020 · US
Process for preparation of di- and polyamines of the diphenylmethane series
US-10689322-B2 · Jun 23, 2020 · US
Process for hydrogenating toluenediamine (TDA) tar
US-10662141-B2 · May 26, 2020 · US
Process for the preparation of di- and polyamines of the diphenylmethane series
US-2020123096-A1 · Apr 23, 2020 · US
Method for purifying 1,4-diaminobutane
US-10450262-B2 · Oct 22, 2019 · US
Thermally integrated distillation systems and processes using the same
US-10399004-B2 · Sep 3, 2019 · US
Discrimination of cis- and trans-1,3-diaminocyclohexanes
US-2019256451-A1 · Aug 22, 2019 · US
Thermally integrated distillation systems and processes using the same
US-2019247766-A1 · Aug 15, 2019 · US
Process for hydrogenating toluenediamine (tda) tar
US-2019241501-A1 · Aug 8, 2019 · US
Process for separation of diamines and/or omega-aminoacids from a feed mixture
US-10343084-B2 · Jul 9, 2019 · US
Method for producing cis- and trans-enriched MDACH
US-10336668-B2 · Jul 2, 2019 · US
Process for separation of diamines and/or omega-aminoacids from a feed fixture
US-10265642-B2 · Apr 23, 2019 · US
Process for the separation of organic compounds
US-2018369759-A1 · Dec 27, 2018 · US
Method for isomerizing bis(aminomethyl) cyclohexane
US-10118888-B2 · Nov 6, 2018 · US
Process for phase separation or extraction and device suitable therefor
US-2018304173-A1 · Oct 25, 2018 · US
Silica synthesis
US-2018282169-A1 · Oct 4, 2018 · US
Materials and methods for the selective recovery of multivalent products
US-2018207631-A1 · Jul 26, 2018 · US
Zeolite adsorbents, preparation process therefor and uses thereof
US-2018201555-A1 · Jul 19, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C209/86?
- CPC C07C209/86 is the Cooperative Patent Classification code for “Separation.”
- How many patents are filed under CPC C07C209/86 (Separation)?
- Our database includes 138 publications tagged with this CPC code.
- Is patent activity under CPC C07C209/86 growing?
- Publication counts under this code: 14 in 2024 vs 17 in 2025 (latest complete years).