Paper filler composition
US-2024240400-A1 · Jul 18, 2024 · US
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)}
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)} · 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 | D21C9/00 |
| Official title | After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)} |
| Display label | After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)} |
| Total patents | 137 |
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 | 6 |
| 2016 | 16 |
| 2017 | 23 |
| 2018 | 11 |
| 2019 | 22 |
| 2020 | 18 |
| 2021 | 17 |
| 2022 | 11 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for applying composition containing a cationic trivalent metal and debonder and fluff pulp sheet made from same
US-10260201-B2 · Apr 16, 2019 · US
Modified fiber from shredded pulp sheets, methods, and systems
US-2019085508-A1 · Mar 21, 2019 · US
Paper filler composition
US-2019078257-A1 · Mar 14, 2019 · US
Paper filler composition
US-2018371694-A1 · Dec 27, 2018 · US
Modified fiber from shredded pulp sheets, methods, and systems
US-10156042-B2 · Dec 18, 2018 · US
Paper filler composition
US-10100464-B2 · Oct 16, 2018 · US
Odor control pulp composition
US-2018274172-A1 · Sep 27, 2018 · US
Modified fiber, methods, and systems
US-2018258589-A1 · Sep 13, 2018 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-2018237806-A1 · Aug 23, 2018 · US
Modified fiber, methods, and systems
US-9995000-B2 · Jun 12, 2018 · US
Process for producing at least one ply of a paper or paperboard product and a paper or paperboard product
US-9988765-B2 · Jun 5, 2018 · US
Process for producing increased bulk pulp fibers, pulp fibers obtained, and products incorporating same
US-2018127919-A1 · May 10, 2018 · US
Method of making bleached microcrystalline cellulose
US-2018119346-A1 · May 3, 2018 · US
Method of directed fouling of a substance onto a selected surface
US-2018023251-A1 · Jan 25, 2018 · US
Enzymatic process combined with hot caustic extraction for the removal of hemicelluloses from paper-grade pulp
US-2017350072-A1 · Dec 7, 2017 · US
Process for applying composition containing a cationic trivalent metal and debonder and fluff pulp sheet made from same
US-2017342662-A1 · Nov 30, 2017 · US
A method for manufacturing microfibrillated polysaccharide
US-2017320969-A1 · Nov 9, 2017 · US
Method for manufacturing recycled pulp from used sanitary article
US-2017305037-A1 · Oct 26, 2017 · US
Method of processing and fractionating biomass and use of fractions thus obtained
US-2017298152-A1 · Oct 19, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C9/00?
- CPC D21C9/00 is the Cooperative Patent Classification code for “After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)}.”
- How many patents are filed under CPC D21C9/00 (After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters {; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere (polysaccharides, derivatives thereof C08B; paper-making D21B - D21H)})?
- Our database includes 137 publications tagged with this CPC code.
- Is patent activity under CPC D21C9/00 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).