Method for purifying 1,2-difluoroethylene (hfo-1132)
US-2021323899-A1 · Oct 21, 2021 · US
by isomerisation
by isomerisation · 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 | C07C17/358 |
| Official title | by isomerisation |
| Display label | by isomerisation |
| Total patents | 107 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 14 |
| 2017 | 8 |
| 2018 | 9 |
| 2019 | 11 |
| 2020 | 2 |
| 2021 | 11 |
| 2022 | 12 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 8 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hfo-1234ze and hfo-1234yf compositions and processes for producing and using the compositions
US-2021261487-A1 · Aug 26, 2021 · US
Method for producing difluoroethylene
US-2021147323-A1 · May 20, 2021 · US
Method for modifying fluorine distribution in a hydrocarbon compound
US-2021114955-A1 · Apr 22, 2021 · US
Method for isomerizing organic compound, and method for producing isomer of organic compound
US-10703696-B2 · Jul 7, 2020 · US
Refrigerant circulation device and refrigerant circulation method
US-2020011578-A1 · Jan 9, 2020 · US
Method or producing hydrohalofluoroolefins
US-10513479-B2 · Dec 24, 2019 · US
Catalytic isomerization of Z-1,1,1,4,4,4-hexafluoro-2-butene to E-1,1,1,4,4,4-hexafluoro-2-butene
US-10479745-B2 · Nov 19, 2019 · US
Method for producing 1,3,3,3-tetrafluoropropene (HFO-1234ze) from 1-chloro-3,3,3-trifluoropopene (HCFO-1233zd)
US-10450248-B2 · Oct 22, 2019 · US
Method of producing hydrochlorofluoroolefin and method of producing 2,3,3,3-tetrafluoropropene
US-10442744-B2 · Oct 15, 2019 · US
Process for improving the production of a chlorinated alkene by caustic deydrochlorination of a chlorinated alkane by recycling
US-2019300460-A1 · Oct 3, 2019 · US
Emission control during catalyst regeneration
US-2019283015-A1 · Sep 19, 2019 · US
Method for isomerizing organic compound, and method for producing isomer of organic compound
US-2019241490-A1 · Aug 8, 2019 · US
High temperature isomerization of (e)-1-chloro-3,3,3-trifluoropropene to (z)-1-chloro-3,3,3-trifluoropropene
US-2019177252-A1 · Jun 13, 2019 · US
Compositions of chromium oxyfluoride or fluoride catalysts, their preparation and their use in gas-phase processes
US-2019169102-A1 · Jun 6, 2019 · US
Systems and methods for manufacturing and separating (z)-1-chloro-3,3,3-trifluoropropene
US-2019016652-A1 · Jan 17, 2019 · US
Process for the isomerisation of C3-7 (hydro)(halo)fluoroalkenes
US-10179754-B2 · Jan 15, 2019 · US
Process for catalytic conversion of mixtures of HCFO-1233zd(Z) and HCFC-244fa into HCFO-1233zd(E)
US-10118879-B1 · Nov 6, 2018 · US
Process for the preparation of 5-fluoro-1H-pyrazoles starting from hexafluoropropene
US-10059673-B2 · Aug 28, 2018 · US
Method for Producing Hydrohalofluoroolefins
US-2018215689-A1 · Aug 2, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C17/358?
- CPC C07C17/358 is the Cooperative Patent Classification code for “by isomerisation.”
- How many patents are filed under CPC C07C17/358 (by isomerisation)?
- Our database includes 107 publications tagged with this CPC code.
- Is patent activity under CPC C07C17/358 growing?
- Publication counts under this code: 9 in 2024 vs 8 in 2025 (latest complete years).