Xylylene diisocyanate composition with improved stability and reactivity and optical lens using the same
US-2018334428-A1 · Nov 22, 2018 · 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 | C07C263/20 |
| Official title | Separation; Purification |
| Display label | Separation; Purification |
| Total patents | 192 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 16 |
| 2017 | 21 |
| 2018 | 22 |
| 2019 | 10 |
| 2020 | 20 |
| 2021 | 29 |
| 2022 | 16 |
| 2023 | 12 |
| 2024 | 17 |
| 2025 | 11 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polyisocyanate composition and isocyanate polymer composition
US-10125212-B2 · Nov 13, 2018 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-2018273467-A1 · Sep 27, 2018 · US
Method for producing a cyclic isocyanate
US-2018208550-A1 · Jul 26, 2018 · US
Process for separating an isocyanate prepared by phosgenation of a primary amine in the gas phase from the gaseous crude product of the phosgenation
US-9932299-B2 · Apr 3, 2018 · US
Separation of a phosgene- and hydrogen chloride-comprising stream
US-2018044179-A1 · Feb 15, 2018 · US
Separation method and method for producing isocyanate
US-9884810-B2 · Feb 6, 2018 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-9868692-B2 · Jan 16, 2018 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-9868691-B2 · Jan 16, 2018 · US
Process for operating a gas phase phosgenation plant
US-9845286-B2 · Dec 19, 2017 · US
Method for operating a gas-phase phosgenation plant
US-9840461-B2 · Dec 12, 2017 · US
Solvent refining method for isocyanate prepared by phosgene method and devices used in same
US-9840462-B2 · Dec 12, 2017 · US
Polyisocyanate Composition and Isocyanate Polymer Composition
US-2017298169-A1 · Oct 19, 2017 · US
Process for extracting phosgene
US-9751768-B2 · Sep 5, 2017 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-2017233332-A1 · Aug 17, 2017 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-2017224844-A1 · Aug 10, 2017 · US
Eyewear material, eyewear frame, and eyewear
US-9720137-B2 · Aug 1, 2017 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-2017210698-A1 · Jul 27, 2017 · US
Compounds and compositions for intracellular delivery of therapeutic agents
US-2017210697-A1 · Jul 27, 2017 · US
Method for producing isocyanate
US-9714215-B2 · Jul 25, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C263/20?
- CPC C07C263/20 is the Cooperative Patent Classification code for “Separation; Purification.”
- How many patents are filed under CPC C07C263/20 (Separation; Purification)?
- Our database includes 192 publications tagged with this CPC code.
- Is patent activity under CPC C07C263/20 growing?
- Publication counts under this code: 17 in 2024 vs 11 in 2025 (latest complete years).