Method for preparing perfluorodialkyl ether and apparatus for preparing perfluorodialkyl ether
US-12540111-B2 · Feb 3, 2026 · US
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both carbon chains are substituted by halogen atoms
both carbon chains are substituted by halogen atoms · 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 | C07C43/123 |
| Official title | {both carbon chains are substituted by halogen atoms} |
| Display label | both carbon chains are substituted by halogen atoms |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluorine-containing ether compound and method for producing the same
US-2025230117-A1 · Jul 17, 2025 · US
Electrolyte solution for sodium-ion battery, secondary battery, battery module, battery pack, and electrical apparatus
US-2025079520-A1 · Mar 6, 2025 · US
Haloether, method for producing same, vinyl ether, and method for producing same
US-2023416180-A1 · Dec 28, 2023 · US
Hydrofluorethers and methods of using same
US-2023087560-A1 · Mar 23, 2023 · US
Fluorine substituted unsymmetrical ethers, and compositions, methods and uses including same
US-2022235255-A1 · Jul 28, 2022 · US
Purification method and production method of difluoromethyl-1, 2, 2, 2-tetrafluoroethyl ether
US-10899692-B2 · Jan 26, 2021 · US
Purification Method and Production Method of Difluoromethyl-1, 2, 2, 2-Tetrafluoroethyl Ether
US-2020339494-A1 · Oct 29, 2020 · US
Production method for 1,2,2,2-tetrafluoroethyl difluoromethyl ether (desflurane)
US-10683252-B2 · Jun 16, 2020 · US
Solvent composition, cleaning method, coating film-forming composition, and method of forming a coating film
US-10662134-B2 · May 26, 2020 · US
Methods for producing solvents derived from 1-chloro-3, 3, 3-trifluoro-propene (1233zd)
US-10597346-B2 · Mar 24, 2020 · US
Production Method for 1,2,2,2-Tetrafluoroethyl Difluoromethyl Ether (Desflurane)
US-2019345086-A1 · Nov 14, 2019 · US
Methods for producing solvents derived from 1-chloro-3, 3, 3-trifluoro-propene (1233zd)
US-10351499-B2 · Jul 16, 2019 · US
Solvent composition, cleaning method, coating film-forming composition, and method of forming a coating film
US-2018370882-A1 · Dec 27, 2018 · US
Method for producing sevoflurane
US-10065912-B2 · Sep 4, 2018 · US
Method for producing sevoflurane
US-2018222834-A1 · Aug 9, 2018 · US
Methods of making halogenated fluorinated ether-containing compounds
US-9828320-B2 · Nov 28, 2017 · US
BIS(1,1-Dichloro-3,3,3-trifluoropropyl) ether and process for preparing the same
US-8957258-B2 · Feb 17, 2015 · US