Porous crosslinked material, preparation and application thereof
US-12434221-B2 · Oct 7, 2025 · US
Polysulfonates
Polysulfonates · 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 | C08L81/08 |
| Official title | Polysulfonates |
| Display label | Polysulfonates |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 6 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polymeric material, production method therefor, and polymeric material composition
US-12338327-B2 · Jun 24, 2025 · US
Medical devices
US-2025195832-A1 · Jun 19, 2025 · US
Intrinsically conducting elastomers and methods of making the same
US-2025179297-A1 · Jun 5, 2025 · US
Fluidic Member for Use in an Electrolyzer System
US-2023383428-A1 · Nov 30, 2023 · US
Porous crosslinked material, preparation and application thereof
US-2023330628-A1 · Oct 19, 2023 · US
Electrically conductive elastomer and method of synthesizing the same
US-2023192959-A1 · Jun 22, 2023 · US
Liquid composition, coating film, and method for producing liquid composition
US-11624004-B2 · Apr 11, 2023 · US
One pack-type dental adhesive composition
US-11602490-B2 · Mar 14, 2023 · US
Conductive polymer nanocellulose aerogels and use as strain sensor
US-11549854-B2 · Jan 10, 2023 · US
Polymeric material, production method therefor, and polymeric material composition
US-2022289912-A1 · Sep 15, 2022 · US
Polishing composition, method for producing same, and polishing method
US-11214711-B2 · Jan 4, 2022 · US
One pack-type dental adhesive composition
US-2021205181-A1 · Jul 8, 2021 · US
Iodine-containing polymers for chemically amplified resist compositions
US-10901316-B2 · Jan 26, 2021 · US
Use of copolymers as binders for pelletizing metal containing ores
US-2020407820-A1 · Dec 31, 2020 · US
Polyphenylsulfone-based proton conducting polymer electrolyte, proton conducting solid polymer electrolyte membrane, electrode catalyst layer for solid polymer fuel cells, method for producing electrode catalyst layer for slid polymer fuel cells, and fuel cell
US-10862151-B2 · Dec 8, 2020 · US
Enhanced oil recovery compositions and methods thereof
US-10851629-B2 · Dec 1, 2020 · US
Sulfonic acid ester compound and use therefor
US-10847725-B2 · Nov 24, 2020 · US
Conductive polymer nanocellulose aerogels and use as strain sensor
US-2020363273-A1 · Nov 19, 2020 · US
Iodine-containing polymers for chemically amplified resist compositions
US-2020218149-A1 · Jul 9, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08L81/08?
- CPC C08L81/08 is the Cooperative Patent Classification code for “Polysulfonates.”
- How many patents are filed under CPC C08L81/08 (Polysulfonates)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC C08L81/08 growing?
- Publication counts under this code: 6 in 2023 vs 4 in 2025 (latest complete years).