Crosslinked kraft pulp compositions and method
US-2018363245-A1 · Dec 20, 2018 · US
Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents}
Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents} · 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 | D21C9/02 |
| Official title | Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents} |
| Display label | Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents} |
| Total patents | 125 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 12 |
| 2017 | 21 |
| 2018 | 18 |
| 2019 | 7 |
| 2020 | 12 |
| 2021 | 9 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 10 |
| 2025 | 13 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Detoxifying and recycling of washing solution used in pretreatment of lignocellulose-containing materials
US-10072380-B2 · Sep 11, 2018 · US
Arrangement and system for a treatment process
US-10047408-B2 · Aug 14, 2018 · US
Vapor relief strainer with cleaner
US-2018207557-A1 · Jul 26, 2018 · US
Method for clean fiber recovery from contaminated articles involving the addition of magnetic particles
US-2018209094-A1 · Jul 26, 2018 · US
Method for clean fiber recovery from contaminated articles
US-2018202102-A1 · Jul 19, 2018 · US
Process and a dissolving pulp manufactured by the process
US-10023995-B2 · Jul 17, 2018 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-2018187372-A1 · Jul 5, 2018 · US
Brown Stock Wash Control
US-2018187376-A1 · Jul 5, 2018 · US
Method for catalytic oxidation of cellulose and method for making a cellulose product
US-9969816-B2 · May 15, 2018 · US
Molar mass controlled cellulose
US-2018127515-A1 · May 10, 2018 · US
Processes and systems for the pulping of lignocellulosic materials
US-2018105982-A1 · Apr 19, 2018 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-9926665-B2 · Mar 27, 2018 · US
Washing apparatus and method for preparation of cellulose fibers for use in manufacture of biocomposite materials
US-9915030-B2 · Mar 13, 2018 · US
Synthesis of nanostructures from Phoenix dactylifera agro-wastes
US-9896342-B1 · Feb 20, 2018 · US
Press roll comb plate and related method
US-9803319-B2 · Oct 31, 2017 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-9771687-B2 · Sep 26, 2017 · US
Method of and an arrangement for transferring a process liquid, an industrial facility and a method of simplifying the layout of such
US-2017268170-A1 · Sep 21, 2017 · US
Low Capital Bleaching of Chemical Pulp
US-2017268171-A1 · Sep 21, 2017 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-2017247839-A1 · Aug 31, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C9/02?
- CPC D21C9/02 is the Cooperative Patent Classification code for “Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents}.”
- How many patents are filed under CPC D21C9/02 (Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents})?
- Our database includes 125 publications tagged with this CPC code.
- Is patent activity under CPC D21C9/02 growing?
- Publication counts under this code: 10 in 2024 vs 13 in 2025 (latest complete years).