Polyamide nanofiber nonwovens
US-2022372681-A1 · Nov 24, 2022 · US
Polyamides
Polyamides · 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 | D04H1/4334 |
| Official title | Polyamides |
| Display label | Polyamides |
| Total patents | 117 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 6 |
| 2017 | 9 |
| 2018 | 4 |
| 2019 | 8 |
| 2020 | 13 |
| 2021 | 8 |
| 2022 | 18 |
| 2023 | 12 |
| 2024 | 18 |
| 2025 | 13 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cross layer fiber entanglement to increase strength of 3D part
US-11485110-B2 · Nov 1, 2022 · US
Breathable water resistant film
US-2022184918-A1 · Jun 16, 2022 · US
Composites of polymeric ultrafine fibers and shear-thickening fluids
US-2022154391-A1 · May 19, 2022 · US
Polymeric nonwoven structure for use in high temperature applications
US-11292226-B2 · Apr 5, 2022 · US
Laminated nonwoven fabric
US-11225048-B2 · Jan 18, 2022 · US
Electrospun PNIPAAm/PCL Fiber Mats for Aligned Cell Sheets
US-2021363675-A1 · Nov 25, 2021 · US
Shock pad for synthetic turf and methods for making same
US-11131068-B2 · Sep 28, 2021 · US
Electrospun PNIPAAm/PCL fiber mats for aligned cell sheets
US-11111611-B2 · Sep 7, 2021 · US
Polyamide nanofiber nonwovens for acoustic applications
US-2021262131-A1 · Aug 26, 2021 · US
Laminated nonwoven fabric
US-11015272-B2 · May 25, 2021 · US
Composite nonwoven sheet material
US-2021114341-A1 · Apr 22, 2021 · US
Irregularly shaped polymer fibers
US-2021002801-A1 · Jan 7, 2021 · US
Water-permeability-imparting agent, water-permeable fiber, non-woven fabric, and water-absorbing article
US-10881758-B2 · Jan 5, 2021 · US
Nonwoven multilayer structures having nanofiber layers
US-2020324510-A1 · Oct 15, 2020 · US
Cross layer fiber entanglement to increase strength of 3d part
US-2020307147-A1 · Oct 1, 2020 · US
Thermal insulation filling material, preparation method thereof, and thermal insulation article
US-2020308741-A1 · Oct 1, 2020 · US
Polyamide nanofiber nonwovens
US-2020283937-A1 · Sep 10, 2020 · US
Shock Pad for Synthetic Turf and Methods for Making Same
US-2020224373-A1 · Jul 16, 2020 · US
Electrospun Nanofibers
US-2020224335-A1 · Jul 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D04H1/4334?
- CPC D04H1/4334 is the Cooperative Patent Classification code for “Polyamides.”
- How many patents are filed under CPC D04H1/4334 (Polyamides)?
- Our database includes 117 publications tagged with this CPC code.
- Is patent activity under CPC D04H1/4334 growing?
- Publication counts under this code: 18 in 2024 vs 13 in 2025 (latest complete years).