Composite film, method for fabricating the same and applications thereof
US-2020376821-A1 · Dec 3, 2020 · US
Condensation or reaction polymers
Condensation or reaction polymers · Cooperative Patent Classification (CPC)
Textile and paper production, treatment, and products.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | D04H1/4326 |
| Official title | Condensation or reaction polymers |
| Display label | Condensation or reaction polymers |
| Total patents | 120 |
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 | 11 |
| 2016 | 6 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 12 |
| 2020 | 17 |
| 2021 | 10 |
| 2022 | 11 |
| 2023 | 15 |
| 2024 | 14 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composite polymer electrolyte membrane, membrane electrode assembly and solid polymer fuel cell using same
US-10826098-B2 · Nov 3, 2020 · US
Polyphenylene sulfide short fiber, fibrous structure, filter felt, and bag filter
US-2020324234-A1 · Oct 15, 2020 · US
Non-woven fabric for liquid-permeable sheet of absorbent article, and absorbent article which includes said non-woven fabric as liquid-permeable sheet
US-2020268571-A1 · Aug 27, 2020 · US
Process of forming an acid-doped polyaniline solution
US-2020223990-A1 · Jul 16, 2020 · US
Wet nonwoven fabric containing meta-aramid and polyphenylene sulfide and laminated sheet of the same
US-2020208351-A1 · Jul 2, 2020 · US
Porous poly(vinyl acetal) object and nonwoven poly(vinyl acetal) fabric
US-10696812-B2 · Jun 30, 2020 · US
Laminated polyarylene sulfide heat-resistant filter
US-10688753-B2 · Jun 23, 2020 · US
Polyetherimide-based fiber, method for manufacturing same, and fiber structure containing same
US-10683589-B2 · Jun 16, 2020 · US
Blood filter
US-2020129688-A1 · Apr 30, 2020 · US
Resin, resin composition, nonwoven fabric using same, fiber product, separator, secondary battery and electric double layer capacitor, and method for producing nonwoven fabric
US-2020131366-A1 · Apr 30, 2020 · US
Dimensionally-stable, fire-resistant melt-blown fibers and nonwoven structures including a flame retarding polymer
US-2020071865-A1 · Mar 5, 2020 · US
Insulating nonwoven fabric and method for manufacturing the same, insulating material
US-10526736-B2 · Jan 7, 2020 · US
Nonwoven fabric
US-2019390381-A1 · Dec 26, 2019 · US
Production method of nonwoven fabric
US-2019382923-A1 · Dec 19, 2019 · US
Method for providing an anti-microbial and an anti-pilling effect and for improving dye uptake to textiles, novel co-polymers and textiles
US-2019375869-A1 · Dec 12, 2019 · US
Thermoplastic resin fiber with dispersant attached
US-2019360149-A1 · Nov 28, 2019 · US
Nonwoven fabric and associated composite and methods of making
US-2019352821-A1 · Nov 21, 2019 · US
Sound-absorbing thermal-insulating material
US-2019329525-A1 · Oct 31, 2019 · US
Method for producing a wet-laid nonwoven fabric
US-2019276960-A1 · Sep 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D04H1/4326?
- CPC D04H1/4326 is the Cooperative Patent Classification code for “Condensation or reaction polymers.”
- How many patents are filed under CPC D04H1/4326 (Condensation or reaction polymers)?
- Our database includes 120 publications tagged with this CPC code.
- Is patent activity under CPC D04H1/4326 growing?
- Publication counts under this code: 14 in 2024 vs 4 in 2025 (latest complete years).