Method for reducing pulp viscosity in production of dissolving pulp
US-10513824-B2 · Dec 24, 2019 · US
Use of compounds accelerating the pulping processes
Use of compounds accelerating the pulping processes · 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 | D21C3/222 |
| Official title | {Use of compounds accelerating the pulping processes} |
| Display label | Use of compounds accelerating the pulping processes |
| Total patents | 95 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 22 |
| 2017 | 14 |
| 2018 | 5 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Refiner plate segment with pre-dam
US-10378149-B2 · Aug 13, 2019 · US
Treatment of lignocellulosic biomass with aromatic chemicals as scavengers
US-10370501-B2 · Aug 6, 2019 · US
Phenols as additives in kraft pulping
US-2019112757-A1 · Apr 18, 2019 · US
Method for enhanced oxygen delignification of chemical wood pulps
US-2019078258-A1 · Mar 14, 2019 · US
Ionic polymers and use thereof in processing of biomass
US-2019031797-A1 · Jan 31, 2019 · US
Methods of producing a paper product
US-2018245285-A1 · Aug 30, 2018 · US
High yield and enhanced performance fiber
US-10000889-B2 · Jun 19, 2018 · US
Method for reducing pulp viscosity in production of dissolving pulp
US-2018163344-A1 · Jun 14, 2018 · US
Methods of producing a paper product
US-9945073-B2 · Apr 17, 2018 · US
Stable and homogenous anthraquinone compositions and preparations thereof
US-2018044853-A1 · Feb 15, 2018 · US
Refiner plate segment with pre-dam
US-2017362773-A1 · Dec 21, 2017 · US
Method of digesting lignocellulosic material
US-9803317-B2 · Oct 31, 2017 · US
Methods of producing a paper product
US-2017306557-A1 · Oct 26, 2017 · US
Methods and systems for processing cellulosic biomass
US-9790436-B2 · Oct 17, 2017 · US
Methods and systems for processing cellulosic biomass
US-9790432-B2 · Oct 17, 2017 · US
Catalytic biomass conversion methods, catalysts, and methods of making the same
US-9783474-B2 · Oct 10, 2017 · US
Methods and systems for processing cellulosic biomass
US-9783740-B2 · Oct 10, 2017 · US
Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass
US-2017204563-A1 · Jul 20, 2017 · US
Methods of producing a paper product
US-9683329-B2 · Jun 20, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C3/222?
- CPC D21C3/222 is the Cooperative Patent Classification code for “Use of compounds accelerating the pulping processes.”
- How many patents are filed under CPC D21C3/222 (Use of compounds accelerating the pulping processes)?
- Our database includes 95 publications tagged with this CPC code.
- Is patent activity under CPC D21C3/222 growing?
- Publication counts under this code: 5 in 2024 vs 12 in 2025 (latest complete years).