Method for setting polymerization condition and method for manufacturing optical material
US-12384870-B2 · Aug 12, 2025 · US
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Anhydrides, e.g. cyclic anhydrides
Anhydrides, e.g. cyclic anhydrides · 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 | C08F22/04 |
| Official title | Anhydrides, e.g. cyclic anhydrides |
| Display label | Anhydrides, e.g. cyclic anhydrides |
| Total patents | 13 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2017 | 2 |
| 2018 | 2 |
| 2020 | 1 |
| 2021 | 2 |
| 2023 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Surface-eroding photo-curable acrylated and methacrylated anhydride based resins
US-2023295456-A1 · Sep 21, 2023 · US
Process for cross-linked polyethylene production
US-11203650-B2 · Dec 21, 2021 · US
Method for setting polymerization condition and method for manufacturing optical material
US-2021079151-A1 · Mar 18, 2021 · US
Process for production of cross-linked polyethylene articles
US-10550206-B2 · Feb 4, 2020 · US
Polymerizable composition and optically anisotropic body using same
US-2018346614-A1 · Dec 6, 2018 · US
Process for cross-linked polyethylene production
US-10093756-B2 · Oct 9, 2018 · US
Polymer for optical film, and optical film including same
US-9562991-B2 · Feb 7, 2017 · US
Modification of polymers containing an anhydride and uses thereof
US-9546228-B2 · Jan 17, 2017 · US
Modification of polymers containing an anhydride and uses thereof
US-2015315307-A1 · Nov 5, 2015 · US
Process for producing improved zein articles
US-9102831-B1 · Aug 11, 2015 · US
Modification of polymers containing an anhydride and uses thereof
US-9079997-B2 · Jul 14, 2015 · US
Method for producing polymer compound, polymer compound, and photoresist resin composition
US-2015147696-A1 · May 28, 2015 · US