Citronellol alkoxylate surfactants
US-12528991-B2 · Jan 20, 2026 · US
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Ether carboxylic acids
Ether carboxylic acids · 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 | C09K23/44 |
| Official title | Ether carboxylic acids |
| Display label | Ether carboxylic acids |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Low-viscosity multi-type emulsion composition
US-2025360065-A1 · Nov 27, 2025 · US
Dispersions of polymeric oil additives
US-11976248-B2 · May 7, 2024 · US
Liquid crosslinking agent and coating fluid of liquid crosslinking agent
US-2023193072-A1 · Jun 22, 2023 · US
Branched fluorine-containing compound
US-11680037-B2 · Jun 20, 2023 · US
Powdered dispersant for hydraulic compositions and production method thereof
US-2023055804-A1 · Feb 23, 2023 · US
Citronellol alkoxylate surfactants
US-2023058226-A1 · Feb 23, 2023 · US
Compositions For Preparing Microemulsion, Microemulsion, Method For Producing Composition And Microemulsion, And Use Of Mircoemulsion
US-2022346372-A1 · Nov 3, 2022 · US
Branched fluorine-containing compound
US-2021355077-A1 · Nov 18, 2021 · US
Branched fluorine-containing compound
US-11104639-B2 · Aug 31, 2021 · US
Core-shell structured non-ionic nanoemulsion system and preparation and use thereof
US-11097239-B2 · Aug 24, 2021 · US
Dispersions Of Polymeric Oil Additives
US-2020283692-A1 · Sep 10, 2020 · US
Branched fluorine-containing compound
US-2020270203-A9 · Aug 27, 2020 · US
Core-shell structured non-ionic nanoemulsion system and preparation and use thereof
US-2020206706-A1 · Jul 2, 2020 · US
Branched fluorine-containing compound
US-2019256457-A1 · Aug 22, 2019 · US
Thermally stable surfactants for oil based drilling fluids
US-2019055447-A1 · Feb 21, 2019 · US