Paper filler composition
US-2024240400-A1 · Jul 18, 2024 · US
of waste paper
of waste paper · 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 | D21B1/32 |
| Official title | of waste paper |
| Display label | of waste paper |
| Total patents | 103 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 7 |
| 2020 | 16 |
| 2021 | 16 |
| 2022 | 11 |
| 2023 | 11 |
| 2024 | 12 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of making fire retardant materials and related products
US-2024191430-A1 · Jun 13, 2024 · US
Supported toothed plates in a disperser
US-11208763-B2 · Dec 28, 2021 · US
Starch composite for binding fibers, fiber structure, and fiber structure-manufacturing apparatus
US-2021363700-A1 · Nov 25, 2021 · US
Paper filler composition
US-11162219-B2 · Nov 2, 2021 · US
Fiber body manufacturing method and fiber body manufacturing apparatus
US-2021301463-A1 · Sep 30, 2021 · US
Composite, molded product, and method for producing molded product
US-2021301107-A1 · Sep 30, 2021 · US
Shredder and sheet manufacturing apparatus
US-11123746-B2 · Sep 21, 2021 · US
Method for manufacturing recycled pulp from used sanitary products
US-11098447-B2 · Aug 24, 2021 · US
Swirling flow generation device and deposition device
US-11090591-B2 · Aug 17, 2021 · US
Recycled pulp fiber manufacturing method
US-11053638-B2 · Jul 6, 2021 · US
Binder composition and method comprising microfibrillated cellulose and recycled cellulosic materials
US-2021131039-A1 · May 6, 2021 · US
Defibrating device and sheet manufacturing apparatus
US-10961657-B2 · Mar 30, 2021 · US
Method for recovering pulp fiber from used sanitary product and recycled pulp obtained thereby
US-10961658-B2 · Mar 30, 2021 · US
Small piece supplying apparatus and fibrous body molding apparatus
US-2021060820-A1 · Mar 4, 2021 · US
Sheet manufacturing apparatus
US-2021062415-A1 · Mar 4, 2021 · US
Methods for deinking uv prints
US-2021025113-A1 · Jan 28, 2021 · US
Method for treating aqueous feed by dissolved gas flotation
US-2020399828-A1 · Dec 24, 2020 · US
Process to recover a portion of post-recycling municipal solid waste
US-2020362513-A1 · Nov 19, 2020 · US
Recycled pulp fiber manufacturing method
US-2020308764-A1 · Oct 1, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21B1/32?
- CPC D21B1/32 is the Cooperative Patent Classification code for “of waste paper.”
- How many patents are filed under CPC D21B1/32 (of waste paper)?
- Our database includes 103 publications tagged with this CPC code.
- Is patent activity under CPC D21B1/32 growing?
- Publication counts under this code: 12 in 2024 vs 9 in 2025 (latest complete years).