Method of making fire retardant materials and related products
US-2024191430-A1 · Jun 13, 2024 · US
Working-up waste paper (mechanical part D21B1/08, D21B1/32)
Working-up waste paper (mechanical part D21B1/08, D21B1/32) · 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 | D21C5/02 |
| Official title | Working-up waste paper (mechanical part D21B1/08, D21B1/32) |
| Display label | Working-up waste paper (mechanical part D21B1/08, D21B1/32) |
| Total patents | 204 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 12 |
| 2017 | 16 |
| 2018 | 14 |
| 2019 | 22 |
| 2020 | 38 |
| 2021 | 28 |
| 2022 | 16 |
| 2023 | 22 |
| 2024 | 8 |
| 2025 | 19 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for mill effluent biological oxygen demand (bod) reduction
US-2019301095-A1 · Oct 3, 2019 · US
Method for preserving recycled fiber by using biocides in paper manufacturing and method for manufacturing paper using recycled fibers
US-10422079-B2 · Sep 24, 2019 · US
Fiber processing device, fibrous feedstock recycling device, and control method of a fiber processing device
US-2019218713-A1 · Jul 18, 2019 · US
Process for manufacturing recycled pulp from used sanitary goods
US-2019211502-A1 · Jul 11, 2019 · US
Processing apparatus, sheet manufacturing apparatus, processing method, and sheet manufacturing method
US-2019203415-A1 · Jul 4, 2019 · US
Fiber processing device and fibrous feedstock recycling device
US-2019186052-A1 · Jun 20, 2019 · US
Method for recovering pulp fibers from used absorbent article
US-2019186074-A1 · Jun 20, 2019 · US
Process for manufacturing recycled pulp from used sanitary goods
US-10280560-B2 · May 7, 2019 · US
Sheet manufacturing apparatus
US-10179423-B2 · Jan 15, 2019 · US
Water absorbing material and manufacturing method thereof
US-10159956-B2 · Dec 25, 2018 · US
Sheet manufacturing apparatus
US-2018355556-A1 · Dec 13, 2018 · US
High Consistency Re-Pulping Method, Apparatus and Absorbent Products Incorporating Recycled Fiber
US-2018347111-A1 · Dec 6, 2018 · US
Sheet manufacturing apparatus
US-2018334765-A1 · Nov 22, 2018 · US
Insulated bag with handles
US-2018327172-A1 · Nov 15, 2018 · US
Sheet manufacturing apparatus
US-10100466-B2 · Oct 16, 2018 · US
Nanocellulose production co-located at a pulp and paper mill
US-2018251941-A1 · Sep 6, 2018 · US
Method for processing packing material to recover aluminium
US-10046978-B2 · Aug 14, 2018 · US
Sheet manufacturing apparatus
US-10041199-B2 · Aug 7, 2018 · US
Method for clean fiber recovery from contaminated articles involving the addition of magnetic particles
US-2018209094-A1 · Jul 26, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C5/02?
- CPC D21C5/02 is the Cooperative Patent Classification code for “Working-up waste paper (mechanical part D21B1/08, D21B1/32).”
- How many patents are filed under CPC D21C5/02 (Working-up waste paper (mechanical part D21B1/08, D21B1/32))?
- Our database includes 204 publications tagged with this CPC code.
- Is patent activity under CPC D21C5/02 growing?
- Publication counts under this code: 8 in 2024 vs 19 in 2025 (latest complete years).