Method of Forming Carbon Fibers Having Internal Cavities
US-2017362088-A1 · Dec 21, 2017 · US
with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08)
with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) · 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 | D01D5/24 |
| Official title | with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) |
| Display label | with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) |
| Total patents | 282 |
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 | 29 |
| 2016 | 13 |
| 2017 | 25 |
| 2018 | 21 |
| 2019 | 23 |
| 2020 | 18 |
| 2021 | 36 |
| 2022 | 28 |
| 2023 | 30 |
| 2024 | 34 |
| 2025 | 14 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Dehumidification system
US-9815020-B2 · Nov 14, 2017 · US
Method for producing a carbon hollow fiber membrane
US-2017320020-A1 · Nov 9, 2017 · US
Electrospun microtubes and nanotubes containing rheological fluid
US-9809908-B2 · Nov 7, 2017 · US
Fine Hollow Fibers having a High Void Fraction
US-2017304128-A1 · Oct 26, 2017 · US
Spinneret assembly for spinning polymeric fibers
US-2017306527-A1 · Oct 26, 2017 · US
Sheet material and manufacturing method thereof
US-2017254018-A1 · Sep 7, 2017 · US
Heat-storing and warmth-retaining fleece and method for manufacturing same
US-2017238635-A1 · Aug 24, 2017 · US
Carbon film for fluid separation, fluid separation film module, and method for producing carbon film for fluid separation
US-2017216779-A1 · Aug 3, 2017 · US
Electrostatic-assisted fiber spinning method and production of highly aligned and packed hollow fiber assembly and membrane
US-9713521-B2 · Jul 25, 2017 · US
Spunbonded nonwoven fabrics
US-9693912-B2 · Jul 4, 2017 · US
Microtubes and methods of producing same
US-2017175296-A1 · Jun 22, 2017 · US
Separation membrane and method for producing same
US-2017157572-A1 · Jun 8, 2017 · US
Method of making hollow fiber with gradient properties
US-2017159210-A1 · Jun 8, 2017 · US
Fluorinated surfactants and stabilization of polytetrafluoroethylene (PTFE) particles in hollow fiber spin solutions
US-9656203-B2 · May 23, 2017 · US
Hollow-fibre membrane having novel structure, and production method therefor
US-9610545-B2 · Apr 4, 2017 · US
Medical electrical lead with biostable pvdf-based materials
US-2017021160-A1 · Jan 26, 2017 · US
Polyglycolic acid resin short fibers for use in well treatment fluid
US-9534163-B2 · Jan 3, 2017 · US
Method for producing porous membrane and drying device of porous membrane
US-9528760-B2 · Dec 27, 2016 · US
Method for making marco-scale carbon nanotube tube structure
US-9523162-B2 · Dec 20, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D01D5/24?
- CPC D01D5/24 is the Cooperative Patent Classification code for “with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08).”
- How many patents are filed under CPC D01D5/24 (with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08))?
- Our database includes 282 publications tagged with this CPC code.
- Is patent activity under CPC D01D5/24 growing?
- Publication counts under this code: 34 in 2024 vs 14 in 2025 (latest complete years).