Ion exchange membrane
US-10518258-B2 · Dec 31, 2019 · US
containing fluorine
containing fluorine · 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 | C08J5/225 |
| Official title | {containing fluorine} |
| Display label | containing fluorine |
| Total patents | 111 |
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 | 9 |
| 2016 | 6 |
| 2017 | 18 |
| 2018 | 13 |
| 2019 | 20 |
| 2020 | 16 |
| 2021 | 10 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-acid polymers from multifunctional amino acids and sulfonyl halide precursors and methods of making the same
US-10468701-B2 · Nov 5, 2019 · US
Process for producing liquid composition and process for producing catalyst layer-forming coating liquid
US-10461336-B2 · Oct 29, 2019 · US
Process for producing liquid composition and process for producing catalyst layer-forming coating liquid
US-10457760-B2 · Oct 29, 2019 · US
Ion exchange membrane
US-10413896-B2 · Sep 17, 2019 · US
Production method for ion exchange membrane for alkali chloride electrolysis, and production method for alkali chloride electrolysis apparatus
US-10385465-B2 · Aug 20, 2019 · US
Fluoropolymer membrane for electrochemical devices
US-2019252657-A1 · Aug 15, 2019 · US
Cation exchange membrane and method for producing potassium hydroxide aqueous solution
US-10370511-B2 · Aug 6, 2019 · US
Ion exchange membrane, method for producing ion exchange membrane, and electrolyzer
US-2019203002-A1 · Jul 4, 2019 · US
Co-extruded ultra thin films
US-10336874-B2 · Jul 2, 2019 · US
Ion exchange membrane
US-10252257-B2 · Apr 9, 2019 · US
Process for the isolation of sulfonyl fluoride polymers and polymers obtained therefrom
US-10208136-B2 · Feb 19, 2019 · US
Anion Exchange Resin, Electrolyte Membrane, Binder For Forming Electrode Catalyst Layer, Fuel Cell Electrode Catalyst Layer And Fuel Cell
US-2019027768-A1 · Jan 24, 2019 · US
Anion Exchange Resin, Electrolyte Membrane, Binder For Forming Electrode Catalyst Layer, Fuel Cell Electrode Catalyst Layer And Fuel Cell
US-2019027767-A1 · Jan 24, 2019 · US
Fluoropolymer hybrid composite
US-2018371194-A1 · Dec 27, 2018 · US
Fuel cell with segregated electrolyte distribution and method for making the same
US-2018331368-A1 · Nov 15, 2018 · US
Film and method for producing same
US-10113041-B2 · Oct 30, 2018 · US
Production method for ion exchange membrane for alkali chloride electrolysis, and production method for alkali chloride electrolysis apparatus
US-2018237925-A1 · Aug 23, 2018 · US
Multi-acid polymers and methods of making the same
US-10035144-B2 · Jul 31, 2018 · US
Process for producing liquid composition, process for producing catalyst layer-forming coating liquid and method for producing membrane/electrode assembly
US-2018186913-A1 · Jul 5, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08J5/225?
- CPC C08J5/225 is the Cooperative Patent Classification code for “containing fluorine.”
- How many patents are filed under CPC C08J5/225 (containing fluorine)?
- Our database includes 111 publications tagged with this CPC code.
- Is patent activity under CPC C08J5/225 growing?
- Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).