Separating a solvent from a nickel catalyst by distillation
US-10759741-B2 · Sep 1, 2020 · US
Separation; Purification
Separation; Purification · 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 | C07C253/34 |
| Official title | Separation; Purification |
| Display label | Separation; Purification |
| Total patents | 160 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 8 |
| 2017 | 11 |
| 2018 | 18 |
| 2019 | 13 |
| 2020 | 18 |
| 2021 | 12 |
| 2022 | 17 |
| 2023 | 19 |
| 2024 | 15 |
| 2025 | 19 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for improved reactive monomer production with membrane filtration
US-10532320-B2 · Jan 14, 2020 · US
PROCESS FOR PREPARING (CYCLOPENTYL[d]PYRIMIDIN-4-YL)PIPERAZINE COMPOUNDS
US-2020010428-A1 · Jan 9, 2020 · US
Process for the preparation of fluoroalkylnitriles and the corresponding fluoroalkyltetrazoles
US-2019375721-A1 · Dec 12, 2019 · US
Process for preparing (cyclopentyl[d]pyrimidin-4-yl)piperazine compounds
US-10457648-B2 · Oct 29, 2019 · US
Methods for multi-dose synthesis of [f-18]fddnp for clinical settings
US-2019322616-A1 · Oct 24, 2019 · US
Quench column aftercooler
US-2019299122-A1 · Oct 3, 2019 · US
Purification method of aldehyde compound
US-10399929-B2 · Sep 3, 2019 · US
Purification method of aldehyde compound
US-10399930-B2 · Sep 3, 2019 · US
Methods for multi-dose synthesis of [F-18]FDDNP for clinical settings
US-10377701-B2 · Aug 13, 2019 · US
Methods and systems for processing an acetonitrile waste stream
US-10336690-B2 · Jul 2, 2019 · US
Purifying method, production method, and distillation apparatus for acrylonitrile
US-10294197-B2 · May 21, 2019 · US
Process for reducing cpi in a dinitrile stream
US-2019135736-A1 · May 9, 2019 · US
Method for preparing acrolein cyanohydrins
US-10214484-B2 · Feb 26, 2019 · US
Purifying method, production method, and distillation apparatus for acrylonitrile
US-2019047945-A1 · Feb 14, 2019 · US
Method for separating materials by means of an extractive distillation process
US-2019031581-A1 · Jan 31, 2019 · US
Method for improved reactve monomer production with membrane filtration
US-2018361319-A1 · Dec 20, 2018 · US
Method and System for Transporting Inventory Items
US-2018354893-A1 · Dec 13, 2018 · US
Method and system for transporting inventory items
US-10133267-B2 · Nov 20, 2018 · US
Method for preparing acrolein cyanohydrins
US-2018305303-A1 · Oct 25, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C253/34?
- CPC C07C253/34 is the Cooperative Patent Classification code for “Separation; Purification.”
- How many patents are filed under CPC C07C253/34 (Separation; Purification)?
- Our database includes 160 publications tagged with this CPC code.
- Is patent activity under CPC C07C253/34 growing?
- Publication counts under this code: 15 in 2024 vs 19 in 2025 (latest complete years).