Apparatus for processing fibrous materials
US-2025290251-A1 · Sep 18, 2025 · US
Rotary screen-drums
Rotary screen-drums · 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 | D21D5/06 |
| Official title | Rotary screen-drums |
| Display label | Rotary screen-drums |
| Total patents | 33 |
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 | 3 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for operating a pulper for producing a suspension, in particular a fibrous suspension
US-2025237012-A1 · Jul 24, 2025 · US
Raw material supply device
US-12123136-B2 · Oct 22, 2024 · US
Method and apparatus for controlling a fiber fractionation system
US-11834786-B2 · Dec 5, 2023 · US
Powder collection unit and fiber processing apparatus
US-11767637-B2 · Sep 26, 2023 · US
Fiber processing device and fiber body manufacturing apparatus
US-11492729-B2 · Nov 8, 2022 · US
Fiber processing device, fibrous feedstock recycling device, and control method of a fiber processing device
US-11390992-B2 · Jul 19, 2022 · US
Powder collection unit and fiber processing apparatus
US-2022205180-A1 · Jun 30, 2022 · US
Separation device
US-11325160-B2 · May 10, 2022 · US
Method for manufacturing injection molding material and injection molding material
US-2022106739-A1 · Apr 7, 2022 · US
Raw material supply device
US-2022034030-A1 · Feb 3, 2022 · US
Collection device, collection method, and fibrous feedstock recycling device
US-11198087-B2 · Dec 14, 2021 · US
Composite, molded product, and method for producing molded product
US-2021301107-A1 · Sep 30, 2021 · US
Swirling flow generation device and deposition device
US-11090591-B2 · Aug 17, 2021 · US
Fiber processing device and fibrous feedstock recycling device
US-11072888-B2 · Jul 27, 2021 · US
Method and apparatus for controlling a fiber fractionation system
US-2021095422-A1 · Apr 1, 2021 · US
Fiber processing device and fiber body manufacturing apparatus
US-2021095400-A1 · Apr 1, 2021 · US
Method and apparatus for controlling a fiber fractionation system
US-10865520-B2 · Dec 15, 2020 · US
Separation device
US-2020222942-A1 · Jul 16, 2020 · US
Swirling flow generation device and deposition device
US-2020206668-A1 · Jul 2, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21D5/06?
- CPC D21D5/06 is the Cooperative Patent Classification code for “Rotary screen-drums.”
- How many patents are filed under CPC D21D5/06 (Rotary screen-drums)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC D21D5/06 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).