Crosslinked kraft pulp compositions and method
US-2018363245-A1 · Dec 20, 2018 · US
by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives · 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 | D21C9/002 |
| Official title | {by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives} |
| Display label | by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives |
| Total patents | 171 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 16 |
| 2017 | 20 |
| 2018 | 16 |
| 2019 | 17 |
| 2020 | 14 |
| 2021 | 22 |
| 2022 | 19 |
| 2023 | 6 |
| 2024 | 12 |
| 2025 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Modified fiber from shredded pulp sheets, methods, and systems
US-10156042-B2 · Dec 18, 2018 · US
Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom
US-10093748-B2 · Oct 9, 2018 · US
Modified fiber, methods, and systems
US-2018258589-A1 · Sep 13, 2018 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-2018187372-A1 · Jul 5, 2018 · US
Method for treating chemical pulps by treatment with ozone in the presence of magnesium ions
US-10006168-B2 · Jun 26, 2018 · US
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-9926665-B2 · Mar 27, 2018 · US
Binder compositions for making crosslinked cellulose fiber
US-2017356134-A1 · Dec 14, 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
Method for producing paper
US-2017314204-A1 · Nov 2, 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
Crosslinked cellulose as precursor in production of high-grade cellulose derivatives and related technology
US-2017247839-A1 · Aug 31, 2017 · US
Crosslinked cellulose as low-cost precursor in production of high-grade cellulose derivatives and related technology
US-2017247833-A1 · Aug 31, 2017 · US
Surface-mineralized organic fibers
US-9725599-B2 · Aug 8, 2017 · US
Method for preparing nanofibrillar cellulose
US-2017218567-A1 · Aug 3, 2017 · US
Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom
US-2017210827-A1 · Jul 27, 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-9708762-B2 · Jul 18, 2017 · US
Ligno cellulosic materials and the products made therefrom
US-2017198436-A1 · Jul 13, 2017 · US
Modified fiber from shredded pulp sheets, methods, and systems
US-2017183817-A1 · Jun 29, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C9/002?
- CPC D21C9/002 is the Cooperative Patent Classification code for “by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives.”
- How many patents are filed under CPC D21C9/002 (by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives)?
- Our database includes 171 publications tagged with this CPC code.
- Is patent activity under CPC D21C9/002 growing?
- Publication counts under this code: 12 in 2024 vs 12 in 2025 (latest complete years).