Method for producing hydroxypropyl methylcellulose acetate succinate
US-2025353932-A1 · Nov 20, 2025 · US
Post-esterification treatments, including purification
Post-esterification treatments, including purification · 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 | C08B3/22 |
| Official title | Post-esterification treatments, including purification |
| Display label | Post-esterification treatments, including purification |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 6 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydroxypropyl methylcellulose acetate succinate and method for producing same
US-2025353933-A1 · Nov 20, 2025 · US
Method for preparing hydrophobic cellulose using pickering emulsion and hydrophobic cellulose prepared using the same
US-2025270762-A1 · Aug 28, 2025 · US
Method for manufacturing cellulose nanocrystals
US-2025206848-A1 · Jun 26, 2025 · US
Compositions and methods related functionalized cellulose nanofibrils
US-2025188196-A1 · Jun 12, 2025 · US
Cellulosic particle
US-12325779-B2 · Jun 10, 2025 · US
Cellulosic particle
US-2024262966-A1 · Aug 8, 2024 · US
Cellulose derivative and metal adsorbent containing said cellulose derivative
US-2023278007-A1 · Sep 7, 2023 · US
Method for producing hypromellose phthalate
US-11319384-B2 · May 3, 2022 · US
Polysaccharide derivatives and cross-metathesis processes for preparing them
US-10851179-B2 · Dec 1, 2020 · US
Method for producing hypromellose phthalate
US-2020031953-A1 · Jan 30, 2020 · US
Gas separation membrane, gas separation module, gas separation apparatus, gas separation method, and method for producing asymmetric gas separation membrane
US-10543455-B2 · Jan 28, 2020 · US
Systems and methods for separating mixtures comprising fluorocarboxylic and carboxylic acids
US-2019330380-A1 · Oct 31, 2019 · US
Coloration of acetylated wood
US-10293515-B2 · May 21, 2019 · US
Coloration of acetylated wood
US-2018162008-A1 · Jun 14, 2018 · US
Production of carboxylated nanocelluloses
US-2018086851-A1 · Mar 29, 2018 · US
Gas separation membrane, gas separation module, gas separation apparatus, gas separation method, and method for producing asymmetric gas separation membrane
US-2017333835-A1 · Nov 23, 2017 · US
Polysaccharide derivatives and cross-metathesis processes for preparing them
US-2016376379-A1 · Dec 29, 2016 · US
Cellulose resin and method for producing the same
US-9512238-B2 · Dec 6, 2016 · US
Cellulose resin composition
US-9487646-B2 · Nov 8, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08B3/22?
- CPC C08B3/22 is the Cooperative Patent Classification code for “Post-esterification treatments, including purification.”
- How many patents are filed under CPC C08B3/22 (Post-esterification treatments, including purification)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C08B3/22 growing?
- Publication counts under this code: 1 in 2024 vs 6 in 2025 (latest complete years).