Membranes for acid-sensitive solvents
US-12502664-B2 · Dec 23, 2025 · US
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Cellulose or wood; Derivatives thereof
Cellulose or wood; Derivatives thereof · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01J39/22 |
| Official title | Cellulose or wood; Derivatives thereof |
| Display label | Cellulose or wood; Derivatives thereof |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of purifying proteins
US-2024051989-A1 · Feb 15, 2024 · US
Cation exchange resins
US-11840554-B2 · Dec 12, 2023 · US
Method for producing porous cellulose particles, and porous cellulose particles
US-11685793-B2 · Jun 27, 2023 · US
Separation media and purification methods for nucleotides and nucleotide components using the same
US-2023028254-A1 · Jan 26, 2023 · US
Membranes for acid-sensitive solvents
US-2022184595-A1 · Jun 16, 2022 · US
Methods of purifying proteins
US-2021246161-A1 · Aug 12, 2021 · US
Methods of purifying proteins
US-10947268-B2 · Mar 16, 2021 · US
Apparatus and method for separating whey proteins from whey using the same
US-10842165-B2 · Nov 24, 2020 · US
Methods of purifying proteins
US-2019218248-A1 · Jul 18, 2019 · US
Apparatus and method for separating whey proteins from whey using the same
US-2019150465-A1 · May 23, 2019 · US
Method for producing porous cellulose particles, and porous cellulose particles
US-2016200835-A1 · Jul 14, 2016 · US