Method for producing hydroxypropyl methylcellulose acetate succinate
US-12516135-B2 · Jan 6, 2026 · US
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Isolation of the cellulose ester
Isolation of the cellulose ester · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C08B3/26 |
| Official title | Isolation of the cellulose ester |
| Display label | Isolation of the cellulose ester |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2018 | 2 |
| 2020 | 1 |
| 2021 | 4 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing hydroxypropyl methylcellulose acetate succinate
US-2025353932-A1 · Nov 20, 2025 · US
Hydroxypropyl methylcellulose acetate succinate and method for producing same
US-2025353933-A1 · Nov 20, 2025 · US
Method of producing hydroxypropyl methylcellulose acetate succinate powder
US-2025034285-A1 · Jan 30, 2025 · US
Hydroxypropyl methyl cellulose phthalate and method for producing the same
US-11873351-B2 · Jan 16, 2024 · US
Method for producing hydroxypropyl methylcellulose acetate succinate
US-2023340162-A1 · Oct 26, 2023 · US
Hydroxypropyl methyl cellulose acetate succinate and method for producing the same
US-11753483-B2 · Sep 12, 2023 · US
Cellulose resin, molding material, molded body, and method for producing cellulose resin
US-11572416-B2 · Feb 7, 2023 · US
Hydroxypropyl methyl cellulose phthalate and method for producing the same
US-2021130498-A1 · May 6, 2021 · US
Hydroxypropyl methyl cellulose acetate succinate and method for producing the same
US-2021130497-A1 · May 6, 2021 · US
Hypromellose phthalate and method for producing hypromellose phthalate
US-10961323-B2 · Mar 30, 2021 · US
Hypromellose acetate succinate and method for producing hypromellose acetate succinate
US-10934367-B2 · Mar 2, 2021 · US
Cellulose resin, molding material, molded body, and method for producing cellulose resin
US-2020181289-A1 · Jun 11, 2020 · US
Hypromellose acetate succinate and method for producing hypromellose acetate succinate
US-2018057612-A1 · Mar 1, 2018 · US
Hypromellose phthalate and method for producing hypromellose phthalate
US-2018057613-A1 · Mar 1, 2018 · US