Method of forming polymer hollow fiber
US-11203819-B1 · Dec 21, 2021 · US
for forming hollow filaments
for forming hollow filaments · 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 | D01F1/08 |
| Official title | for forming hollow filaments |
| Display label | for forming hollow filaments |
| Total patents | 109 |
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 | 5 |
| 2016 | 9 |
| 2017 | 9 |
| 2018 | 13 |
| 2019 | 9 |
| 2020 | 11 |
| 2021 | 23 |
| 2022 | 5 |
| 2023 | 10 |
| 2024 | 7 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hollow porous fibers
US-11186927-B2 · Nov 30, 2021 · US
Polyolefin material having a low density
US-11155688-B2 · Oct 26, 2021 · US
Dual-layer membrane and method for preparing same
US-2021308627-A1 · Oct 7, 2021 · US
Composite soles
US-10806209-B2 · Oct 20, 2020 · US
Polyolefin film for use in packaging
US-10752745-B2 · Aug 25, 2020 · US
Hollow fiber membrane, and method for producing hollow fiber membrane
US-10744467-B2 · Aug 18, 2020 · US
Polymer composites for fused filament fabrication and methods of making the same
US-10744695-B2 · Aug 18, 2020 · US
Carbonaceous structure and method for preparing the same, electrode material and catalyst including the carbonaceous structure, and energy storage device including the electrode material
US-10693139-B2 · Jun 23, 2020 · US
Foaming Fibrous Structures Comprising Particles and Methods for Making Same
US-2020190433-A1 · Jun 18, 2020 · US
Nonwoven fabric structure and method for producing the same
US-10655256-B2 · May 19, 2020 · US
Multi-stage drawing technique for forming porous fibers
US-10640890-B2 · May 5, 2020 · US
Reel changing device and reel changing method
US-10604867-B2 · Mar 31, 2020 · US
Variable-diameter spinning nozzle and processing devices for hollow fiber membrane bundle and membrane module
US-2020070100-A1 · Mar 5, 2020 · US
Cellulose acetate-based asymmetric hollow fiber membrane
US-2020070099-A1 · Mar 5, 2020 · US
Technique for Forming Porous Fibers
US-2019374672-A1 · Dec 12, 2019 · US
Method and system for production of porous graphitic carbon materials embedded with active components
US-2019376209-A1 · Dec 12, 2019 · US
Method for producing a polyphenylsulfone porous hollow fiber membrane
US-2019374909-A1 · Dec 12, 2019 · US
Polymeric Material
US-2019338097-A1 · Nov 7, 2019 · US
Polymer composites for fused filament fabrication and methods of making the same
US-2019217517-A1 · Jul 18, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D01F1/08?
- CPC D01F1/08 is the Cooperative Patent Classification code for “for forming hollow filaments.”
- How many patents are filed under CPC D01F1/08 (for forming hollow filaments)?
- Our database includes 109 publications tagged with this CPC code.
- Is patent activity under CPC D01F1/08 growing?
- Publication counts under this code: 7 in 2024 vs 6 in 2025 (latest complete years).