Composition and method for controlling volatile fatty acid content in pulp, paper, and/or board making processes
US-2026028778-A1 · Jan 29, 2026 · US
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Prevention of corrosion or formation of deposits on pulp-treating equipment (D21C9/08, D21H21/02 take precedence)
Prevention of corrosion or formation of deposits on pulp-treating equipment (D21C9/08, D21H21/02 take precedence) · 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 | D21C9/008 |
| Official title | {Prevention of corrosion or formation of deposits on pulp-treating equipment (D21C9/08, D21H21/02 take precedence)} |
| Display label | Prevention of corrosion or formation of deposits on pulp-treating equipment (D21C9/08, D21H21/02 take precedence) |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Black liquor viscosity reducing and anti-scale agent
US-12331461-B2 · Jun 17, 2025 · US
Method for suppressing sedimentation of suspended substance, method for suppressing pitch trouble, and method for detecting sedimentation of suspended substance
US-12247354-B2 · Mar 11, 2025 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-12114659-B2 · Oct 15, 2024 · US
Black liquor viscosity reducing and anti-scale agent
US-2024150961-A1 · May 9, 2024 · US
Black liquor viscosity reducing and anti-scale agent
US-11905655-B2 · Feb 20, 2024 · US
Method for predicting or controlling microbial status of a paper or board making process
US-11859347-B2 · Jan 2, 2024 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-11643782-B2 · May 9, 2023 · US
Method of reducing hydrophobic contaminants in a pulping or papermaking process
US-2023071350-A1 · Mar 9, 2023 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-2022361497-A1 · Nov 17, 2022 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-11490621-B2 · Nov 8, 2022 · US
Method for suppressing sedimentation of suspended substance, method for suppressing pitch trouble, and method for detecting sedimentation of suspended substance
US-2022325473-A1 · Oct 13, 2022 · US
Use of a polymer product for deposit formation control in manufacture of paper or board
US-11441273-B2 · Sep 13, 2022 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-2022056641-A2 · Feb 24, 2022 · US
Use of a polymer product for deposit formation control in manufacture of paper or board
US-2021301473-A1 · Sep 30, 2021 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-2021127677-A1 · May 6, 2021 · US
Black liquor viscosity reducing and anti-scale agent
US-2021062421-A1 · Mar 4, 2021 · US
Kraft pulp mill scale control with end group modified polycarboxylates
US-2021002826-A1 · Jan 7, 2021 · US
Method for Predicting or Controlling Microbial Status of a Paper or Board Making Process
US-2020299903-A1 · Sep 24, 2020 · US
Method for controlling growth of microorganisms and/or biofilms in an industrial process
US-2020199818-A1 · Jun 25, 2020 · US