Methods of recycling oil from a direct phase emulsion
US-2021261848-A1 · Aug 26, 2021 · US
Oil-in-water emulsions
Oil-in-water emulsions · 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 | C09K8/26 |
| Official title | Oil-in-water emulsions |
| Display label | Oil-in-water emulsions |
| Total patents | 85 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 8 |
| 2017 | 10 |
| 2018 | 10 |
| 2019 | 11 |
| 2020 | 14 |
| 2021 | 13 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Alkoxylate emulsions
US-2021238470-A1 · Aug 5, 2021 · US
Methods and compositions for use in oil and/or gas wells
US-11034879-B2 · Jun 15, 2021 · US
Reusable high performance water based drilling fluids
US-11015106-B2 · May 25, 2021 · US
Emulsions, Treatment Fluids and Methods for Treating Subterranean Formations
US-2021147741-A1 · May 20, 2021 · US
Methods and compositions for stimulating the production of hydrocarbons from subterranean formations
US-2020369950-A1 · Nov 26, 2020 · US
Microemulsion flowback aids for oilfield uses
US-2020270510-A1 · Aug 27, 2020 · US
Methods to manage water influx suitable for pulsed electrical discharge drilling
US-10738549-B1 · Aug 11, 2020 · US
Methods and compositions for stimulating the production of hydrocarbons from subterranean formations
US-10738235-B2 · Aug 11, 2020 · US
Performance non-emulsifiers that employ branched alcohols and a new high-solvency carrier oil
US-10717914-B2 · Jul 21, 2020 · US
Methods and compositions for use in oil and/or gas wells
US-10717919-B2 · Jul 21, 2020 · US
Reusable high performance water based drilling fluids
US-2020216740-A1 · Jul 9, 2020 · US
Recovered Drilling Fluid Formulation
US-2020208476-A1 · Jul 2, 2020 · US
Reusable high performance water based drilling fluids
US-10669468-B2 · Jun 2, 2020 · US
Oil-in-water stable, emulsified spacer fluids
US-10633571-B2 · Apr 28, 2020 · US
Filtrate reducer for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, drilling fluid, and uses thereof
US-2020115612-A1 · Apr 16, 2020 · US
Conformance control and selective blocking in porous media through droplet-droplet interactions in nanoparticle stabilised emulsions
US-2020095495-A1 · Mar 26, 2020 · US
Dialkyl-polyalkylamine compositions, process for their preparation and their use
US-10597492-B2 · Mar 24, 2020 · US
Polymers and emulsions for use in oil and/or gas wells
US-10577531-B2 · Mar 3, 2020 · US
Methods and compositions for use in oil and/or gas wells
US-2019316021-A1 · Oct 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/26?
- CPC C09K8/26 is the Cooperative Patent Classification code for “Oil-in-water emulsions.”
- How many patents are filed under CPC C09K8/26 (Oil-in-water emulsions)?
- Our database includes 85 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/26 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).