Method of producing thermoplastic resin
US-2025282925-A1 · Sep 11, 2025 · US
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Separation or purification
Separation or 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 | C07D201/16 |
| Official title | Separation or purification |
| Display label | Separation or purification |
| Total patents | 17 |
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 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
METHOD OF COLLECTING e-CAPROLACTAM AND POLYAMIDE 6 OLIGOMER, AND METHOD OF PRODUCING POLYAMIDE 6
US-2025257037-A1 · Aug 14, 2025 · US
Method for producing laurolactam, device for synthesizing same, laurolactam composition produced thereby, and method for producing polylaurolactam using same
US-12358872-B2 · Jul 15, 2025 · US
Method for recovering cation component of ionic liquid and method for regenerating ionic liquid
US-2025145567-A1 · May 8, 2025 · US
Method of producing epsilon-caprolactam and method of producing polyamide 6
US-2025122352-A1 · Apr 17, 2025 · US
Separation of impurities in a process for hydrolytically depolymerizing a polyamide
US-2025100965-A1 · Mar 27, 2025 · US
Process for producing high-purity epsilon-caprolactam
US-2025066307-A1 · Feb 27, 2025 · US
Method of producing epsilon-caprolactam and method of producing polyamide 6
US-2025019516-A1 · Jan 16, 2025 · US
METHOD OF COLLECTING FIBROUS FILLING MATERIAL AND e-CAPROLACTAM, AND METHOD OF PRODUCING POLYAMIDE 6
US-2024352217-A1 · Oct 24, 2024 · US
Purification method for laurolactam
US-2024076450-A1 · Mar 7, 2024 · US
Laurolactam preparation method, synthesizing device therefor, laurolactam composition prepared thereby, and polylaurolactam preparation method using same
US-2024067609-A1 · Feb 29, 2024 · US
Method for producing laurolactam, device for synthesizing same, laurolactam composition produced thereby, and method for producing polylaurolactam using same
US-2023020512-A1 · Jan 19, 2023 · US
Preparation of caprolactam from 6-amino caproic acid obtained in a fermentation process
US-2021171459-A1 · Jun 10, 2021 · US
Method for producing epoxy compound containing hydrogen peroxide stabilizer
US-10005742-B2 · Jun 26, 2018 · US
Method for producing epoxy compound containing hydrogen peroxide stabilizer
US-2017275258-A1 · Sep 28, 2017 · US
Preparation of caprolactam from 6-amino caproic acid obtained in a fermentation process
US-2016200677-A1 · Jul 14, 2016 · US
Production method of N-vinyl-2-pyrrolidone
US-9096516-B2 · Aug 4, 2015 · US