Processes and systems for the pulping of lignocellulosic materials
US-2020283953-A1 · Sep 10, 2020 · US
Pulping cellulose-containing materials (digesters D21C7/00)
Pulping cellulose-containing materials (digesters D21C7/00) · 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 | D21C3/00 |
| Official title | Pulping cellulose-containing materials (digesters D21C7/00) |
| Display label | Pulping cellulose-containing materials (digesters D21C7/00) |
| Total patents | 100 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 12 |
| 2017 | 11 |
| 2018 | 12 |
| 2019 | 8 |
| 2020 | 8 |
| 2021 | 6 |
| 2022 | 13 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Processes and systems for the pulping of lignocellulosic materials
US-10724174-B2 · Jul 28, 2020 · US
Method for producing densified cellulosic composite material
US-2020208346-A1 · Jul 2, 2020 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-2020172939-A1 · Jun 4, 2020 · US
Bale of virgin cellulose and cellulose ester
US-2020063363-A1 · Feb 27, 2020 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-10557154-B2 · Feb 11, 2020 · US
Method for reducing pulp viscosity in production of dissolving pulp
US-10513824-B2 · Dec 24, 2019 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-2019360006-A1 · Nov 28, 2019 · US
Cellulose filament-stabilized pickering emulsions
US-2019360151-A1 · Nov 28, 2019 · US
Method for impregnating biomass and device for impregnating biomass
US-2019360150-A1 · Nov 28, 2019 · US
Method and system for treating biomass
US-2019271113-A1 · Sep 5, 2019 · US
Method for extracting cellusose, hemicellulose and lignin from lignocellulose from plant biomass
US-2019249363-A1 · Aug 15, 2019 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-10344303-B2 · Jul 9, 2019 · US
Process for the Recovery of Hydrochloric Acid
US-2019092636-A1 · Mar 28, 2019 · US
Method and device for monitoring the quality of nanofibrillar cellulose
US-10119919-B2 · Nov 6, 2018 · US
Nanocellulose production co-located at a pulp and paper mill
US-2018251941-A1 · Sep 6, 2018 · US
Methods of producing a paper product
US-2018245285-A1 · Aug 30, 2018 · US
Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products
US-2018237806-A1 · Aug 23, 2018 · US
Method for delignifying and bleaching pulp
US-10006169-B2 · Jun 26, 2018 · US
Pile delignification
US-10006167-B2 · Jun 26, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C3/00?
- CPC D21C3/00 is the Cooperative Patent Classification code for “Pulping cellulose-containing materials (digesters D21C7/00).”
- How many patents are filed under CPC D21C3/00 (Pulping cellulose-containing materials (digesters D21C7/00))?
- Our database includes 100 publications tagged with this CPC code.
- Is patent activity under CPC D21C3/00 growing?
- Publication counts under this code: 5 in 2024 vs 9 in 2025 (latest complete years).