High-intensity acoustic treatment of colloidal mineral suspensions for wellbore operations
US-2021404270-A1 · Dec 30, 2021 · US
characterised by the composition of the clay
characterised by the composition of the clay · 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 | C09K8/145 |
| Official title | {characterised by the composition of the clay} |
| Display label | characterised by the composition of the clay |
| Total patents | 102 |
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 | 4 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 5 |
| 2019 | 19 |
| 2020 | 15 |
| 2021 | 20 |
| 2022 | 14 |
| 2023 | 5 |
| 2024 | 10 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Suspension Supporting Additive for Water-Based Drilling and Completions Fluids
US-2021395596-A1 · Dec 23, 2021 · US
Saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof
US-2021348046-A1 · Nov 11, 2021 · US
Downhole fluids and methods of use thereof
US-11168241-B2 · Nov 9, 2021 · US
Well treatment fluid having biodegradable fluid loss control agent
US-11162012-B2 · Nov 2, 2021 · US
Well treatment fluid having biodegradable fluid loss control agent
US-2021309907-A1 · Oct 7, 2021 · US
Hydrating swellable clays
US-11130707-B2 · Sep 28, 2021 · US
Well bore spacer and efficiency fluids comprising geopolymers
US-2021253930-A1 · Aug 19, 2021 · US
Solid/liquid high film strength fluid lubricant
US-11028306-B2 · Jun 8, 2021 · US
Modified cellulose nanocrystals and their use in drilling fluids
US-11028307-B2 · Jun 8, 2021 · US
Pozzolanic by-product for slurry yield enhancement
US-11001742-B2 · May 11, 2021 · US
Pozzolanic By-Product For Slurry Yield Enhancement
US-2021062065-A1 · Mar 4, 2021 · US
Lost circulation material (LCM) pill for total loss control
US-10927282-B2 · Feb 23, 2021 · US
Date pit based drilling fluid composition
US-10899954-B2 · Jan 26, 2021 · US
Date tree trunk-based fibrous loss circulation materials
US-10870787-B2 · Dec 22, 2020 · US
Treatment of calcium-containing bentonites for drilling fluids
US-2020369939-A1 · Nov 26, 2020 · US
Loss circulation material for seepage to moderate loss control
US-10844265-B2 · Nov 24, 2020 · US
Modified nano-silica plugging agent, water-based drilling fluid, and preparation method and use thereof
US-10829681-B1 · Nov 10, 2020 · US
Micro-nanometer plugging anti-collapse drilling fluid and preparation method and use thereof
US-10829679-B1 · Nov 10, 2020 · US
Lost Circulation Material (LCM) Pill for Total Loss Control
US-2020317982-A1 · Oct 8, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/145?
- CPC C09K8/145 is the Cooperative Patent Classification code for “characterised by the composition of the clay.”
- How many patents are filed under CPC C09K8/145 (characterised by the composition of the clay)?
- Our database includes 102 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/145 growing?
- Publication counts under this code: 10 in 2024 vs 7 in 2025 (latest complete years).