Hydroxypropyl methylcellulose acetate succinate and method for producing hydroxypropyl methylcellulose acetate succinate
US-2025361327-A1 · Nov 27, 2025 · US
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by precipitation
by precipitation · 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 | C08B3/28 |
| Official title | by precipitation |
| Display label | by precipitation |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cellulose acetate and method for producing cellulose acetate
US-12344681-B2 · Jul 1, 2025 · US
Cellulose acetate and method for producing cellulose acetate
US-2022227891-A1 · Jul 21, 2022 · US
Cellulose acetate and method for producing cellulose acetate
US-11066484-B2 · Jul 20, 2021 · US
Cellulose acetate, and method and device for producing cellulose acetate
US-2021017296-A1 · Jan 21, 2021 · US
Nutrient composition having lipid metabolism-improving action
US-10869883-B2 · Dec 22, 2020 · US
Cellulose acetate and method for producing cellulose acetate
US-2020262933-A1 · Aug 20, 2020 · US
Cellulose acetate with a low degree of substitution
US-10703825-B2 · Jul 7, 2020 · US
Method for producing cellulose acetate flakes
US-2019389977-A1 · Dec 26, 2019 · US
Nutrient composition having lipid metabolism-improving action
US-2019151349-A1 · May 23, 2019 · US
Cellulose acetate
US-2019077885-A1 · Mar 14, 2019 · US
Nutrient composition having lipid metabolism-improving action
US-10188675-B2 · Jan 29, 2019 · US
Regioselectively substituted cellulose esters produced in a carboxylated ionic liquid process and products produced therefrom
US-10174129-B2 · Jan 8, 2019 · US
Cellulose acetate, and method and device for producing cellulose acetate
US-2018282434-A1 · Oct 4, 2018 · US
Regioselectively substituted cellulose esters produced in a carboxylated ionic liquid process and products produced therefrom
US-9834516-B2 · Dec 5, 2017 · US
Regioselectively substituted cellulose esters produced in a carboxylated ionic liquid process and products produced therefrom
US-2017204201-A1 · Jul 20, 2017 · US
Nutrient composition having lipid metabolism-improving action
US-2016317568-A1 · Nov 3, 2016 · US
Cellulose acetate with a low degree of substitution
US-2016032020-A1 · Feb 4, 2016 · US