Ethylene amine hydrochloride based shale inhibitor for aqueous drilling fluids
US-2023323183-A1 · Oct 12, 2023 · US
characterised by the organic compounds
characterised by the organic compounds · 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 | C09K8/18 |
| Official title | characterised by the organic compounds |
| Display label | characterised by the organic compounds |
| Total patents | 82 |
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 | 5 |
| 2016 | 1 |
| 2017 | 7 |
| 2018 | 15 |
| 2019 | 7 |
| 2020 | 7 |
| 2021 | 10 |
| 2022 | 6 |
| 2023 | 10 |
| 2024 | 10 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Additive to improve cold temperature properties in oil-based fluids
US-11708518-B2 · Jul 25, 2023 · US
Saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof
US-11453812-B2 · Sep 27, 2022 · US
Drilling fluids and methods of making and using thereof
US-2022290030-A1 · Sep 15, 2022 · US
Compositions for delayed acid generation for high temperature applications and methods of making and using same
US-11414590-B2 · Aug 16, 2022 · US
Synergistic Performance of Amine Blends in Shale Control
US-2022243112-A1 · Aug 4, 2022 · US
Anti-bit balling additive
US-11274241-B2 · Mar 15, 2022 · US
Methods of suspending weighting agents in a drilling fluid
US-11261363-B2 · Mar 1, 2022 · US
Anti-bit balling additive
US-2021380863-A1 · Dec 9, 2021 · US
Compositions for delayed acid generation for high temperature applications and methods of making and using same
US-2021371723-A1 · Dec 2, 2021 · US
Saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof
US-2021348046-A1 · Nov 11, 2021 · US
Hydrating swellable clays
US-11130707-B2 · Sep 28, 2021 · US
Compositions for delayed acid generation for high temperature applications and methods of making and using same
US-11098237-B1 · Aug 24, 2021 · US
Gemini surfactants containing an unsaturated linker for clay swelling inhibition
US-2021189222-A1 · Jun 24, 2021 · US
Methods for determining an optimal surfactant structure for oil recovery
US-10995260-B2 · May 4, 2021 · US
Water-based drilling fluids that include lubricants
US-2021032523-A1 · Feb 4, 2021 · US
Date pit based drilling fluid composition
US-10899954-B2 · Jan 26, 2021 · US
Method for making a drilling composition and treating a subterranean formation
US-10889743-B2 · Jan 12, 2021 · US
Methods of suspending weighting agents in a drilling fluid
US-2020332170-A1 · Oct 22, 2020 · US
Water-based drilling, completion, and workover fluid composition with reduced barite sagging
US-2020317981-A1 · Oct 8, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/18?
- CPC C09K8/18 is the Cooperative Patent Classification code for “characterised by the organic compounds.”
- How many patents are filed under CPC C09K8/18 (characterised by the organic compounds)?
- Our database includes 82 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/18 growing?
- Publication counts under this code: 10 in 2024 vs 4 in 2025 (latest complete years).