Xylose mother liquor continuous carbonation and impurity-removal device and method therefor
US-2021381069-A1 · Dec 9, 2021 · US
Regeneration of pulp liquors {or effluent waste waters}
Regeneration of pulp liquors {or effluent waste waters} · 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 | D21C11/00 |
| Official title | Regeneration of pulp liquors {or effluent waste waters} |
| Display label | Regeneration of pulp liquors {or effluent waste waters} |
| Total patents | 82 |
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 | 10 |
| 2016 | 5 |
| 2017 | 13 |
| 2018 | 8 |
| 2019 | 10 |
| 2020 | 10 |
| 2021 | 10 |
| 2022 | 6 |
| 2023 | 6 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Green liquor clarification using sedimentation tank during white liquor preparation
US-11174591-B2 · Nov 16, 2021 · US
Method for controlling carryover in a chemical recovery boiler and a chemical recovery boiler
US-2021071361-A1 · Mar 11, 2021 · US
Vent stack temperature as a feedforward variable for smelt dissolving tank tta control
US-2021010200-A1 · Jan 14, 2021 · US
Process for isolation of hemicelluloses from biomass pulping process waters or spent liquors
US-10870947-B2 · Dec 22, 2020 · US
Black Liquor Concentration by a Membrane Comprising Graphene Oxide on Porous Polymer
US-2020368688-A1 · Nov 26, 2020 · US
Green liquor clarification using sedimentation tank during white liquor preparation
US-2020340179-A1 · Oct 29, 2020 · US
Method of treating fly ash of a recovery boiler
US-2020181841-A1 · Jun 11, 2020 · US
Methods of processing plant fiber, and related systems and compositions
US-10648131-B2 · May 12, 2020 · US
System of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-10640924-B2 · May 5, 2020 · US
Method of producing lignin with reduced amount of odorous substances
US-2020109157-A1 · Apr 9, 2020 · US
Extraction of phytosterols from tall oil soap using a solvent selected from dibromomethane, bromoform, tetrabromomethane or a combination thereof
US-10597602-B2 · Mar 24, 2020 · US
System of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-2020048832-A1 · Feb 13, 2020 · US
Method for producing reactive lignin
US-2020011012-A1 · Jan 9, 2020 · US
Method to convert mechanical pulp derived waste material into value added cellulose products
US-2019376236-A1 · Dec 12, 2019 · US
Method and system of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-10487449-B2 · Nov 26, 2019 · US
Device and method for treating the black liquor resulting from pulping by hydrothermal liquefaction
US-10407827-B2 · Sep 10, 2019 · US
Method for extracting cellusose, hemicellulose and lignin from lignocellulose from plant biomass
US-2019249363-A1 · Aug 15, 2019 · US
Process for Isolation of Hemicelluloses From Biomass Pulping Process Waters or Spent Liquors
US-2019203416-A1 · Jul 4, 2019 · US
Chemical recovery boiler
US-10260744-B2 · Apr 16, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C11/00?
- CPC D21C11/00 is the Cooperative Patent Classification code for “Regeneration of pulp liquors {or effluent waste waters}.”
- How many patents are filed under CPC D21C11/00 (Regeneration of pulp liquors {or effluent waste waters})?
- Our database includes 82 publications tagged with this CPC code.
- Is patent activity under CPC D21C11/00 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).