Sensitive conjugated polymer structure color and sensor using same
US-12454601-B2 · Oct 28, 2025 · US
from cyclic ethers by opening of the heterocyclic ring
from cyclic ethers by opening of the heterocyclic ring · 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 | C08G65/02 |
| Official title | from cyclic ethers by opening of the heterocyclic ring |
| Display label | from cyclic ethers by opening of the heterocyclic ring |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Acidic gas removal agent, acidic gas removal method, acidic gas absorption device, and cleaning device
US-2025303354-A1 · Oct 2, 2025 · US
Fluoropolyether group containing compound and method for producing the same
US-12391797-B2 · Aug 19, 2025 · US
Compositions
US-2025230383-A1 · Jul 17, 2025 · US
Method for the recycling of polyurethane material waste for producing chemical feedstock for the production of isocyanates and polyurethanes
US-12275689-B2 · Apr 15, 2025 · US
Alkylene oxide derivative, defoaming agent, lubricant, cosmetic base material and cosmetics containing same, hair cleaning agent composition, and body cleaning agent composition
US-12187891-B2 · Jan 7, 2025 · US
Stereocomplexes for the delivery of anti-cancer agents
US-2024350644-A1 · Oct 24, 2024 · US
Low molecular weight dry powder polymer for use as paper-making dry strength agent
US-2024262802-A1 · Aug 8, 2024 · US
Continuous process for making polyether polyols
US-12024587-B2 · Jul 2, 2024 · US
Low molecular weight dry powder polymer for use as paper-making dry strength agent
US-11939309-B2 · Mar 26, 2024 · US
Sensitive conjugated polymer structure color and sensor using same
US-2023151160-A1 · May 18, 2023 · US
Direct alkoxylation of bio-oil
US-11639485-B2 · May 2, 2023 · US
Fluoropolyether group containing compound and method for producing the same
US-2022235177-A1 · Jul 28, 2022 · US
Method for the recycling of polyurethane material waste for producing chemical feedstock for the production of isocyanates and polyurethanes
US-2022227701-A1 · Jul 21, 2022 · US
Alkylene oxide derivative, defoaming agent, lubricant, cosmetic base material and cosmetics containing same, hair cleaning agent composition, and body cleaning agent composition
US-2022089869-A1 · Mar 24, 2022 · US
Process for preparing an aqueous dispersion of multistage polymer particles
US-10968342-B2 · Apr 6, 2021 · US
Direct alkoxylation of bio-oil
US-2021071106-A1 · Mar 11, 2021 · US
Low molecular weight dry powder polymer for use as paper-making dry strength agent
US-10920065-B2 · Feb 16, 2021 · US
Low molecular weight dry powder polymer for use as paper-making dry strength agent
US-2021040309-A1 · Feb 11, 2021 · US
Direct alkoxylation of bio-oil
US-10883067-B2 · Jan 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C08G65/02?
- CPC C08G65/02 is the Cooperative Patent Classification code for “from cyclic ethers by opening of the heterocyclic ring.”
- How many patents are filed under CPC C08G65/02 (from cyclic ethers by opening of the heterocyclic ring)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC C08G65/02 growing?
- Publication counts under this code: 4 in 2024 vs 6 in 2025 (latest complete years).