Graft polymers, methods of making graft polymers, and uses thereof
US-2025289920-A1 · Sep 18, 2025 · US
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Esters
Esters · 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 | C08B33/02 |
| Official title | Esters |
| Display label | Esters |
| Total patents | 7 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2018 | 2 |
| 2020 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
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Separating agent for optical isomer
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Amylose derivative and optical isomer separating agent containing same
US-2018056270-A1 · Mar 1, 2018 · US
Amylose derivative and optical isomer separating agent containing same
US-9901902-B1 · Feb 27, 2018 · US
Polysaccharide derivative and separating agent for optical isomer containing the same
US-9499638-B2 · Nov 22, 2016 · US
Separating agent for optical isomer
US-2016326267-A1 · Nov 10, 2016 · US