Dispersant in cement formulations for oil and gas wells
US-2018312439-A1 · Nov 1, 2018 · US
using "spacer" compositions
using "spacer" compositions · 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 | C09K8/424 |
| Official title | {using "spacer" compositions} |
| Display label | using "spacer" compositions |
| Total patents | 223 |
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 | 15 |
| 2016 | 13 |
| 2017 | 13 |
| 2018 | 31 |
| 2019 | 33 |
| 2020 | 42 |
| 2021 | 26 |
| 2022 | 18 |
| 2023 | 13 |
| 2024 | 9 |
| 2025 | 8 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Enhanced acid soluble wellbore strengthening solution
US-10093845-B2 · Oct 9, 2018 · US
Dispersant in cement formulations for oil and gas wells
US-2018282216-A1 · Oct 4, 2018 · US
Chemical means to predict end of job in reverse-circulation cementing
US-2018274327-A1 · Sep 27, 2018 · US
Spacer fluids and cement slurries that include surfactants
US-2018223168-A1 · Aug 9, 2018 · US
Emulsified drilling fluids and methods of making and use thereof
US-2018223164-A1 · Aug 9, 2018 · US
Spacer fluid compositions that include surfactants
US-2018223169-A1 · Aug 9, 2018 · US
Anti-bit balling drilling fluids, and methods of making and use thereof
US-2018223160-A1 · Aug 9, 2018 · US
Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore
US-2018223156-A1 · Aug 9, 2018 · US
Development of anti-bit balling fluids
US-2018223162-A1 · Aug 9, 2018 · US
Lubricants for water-based drilling fluids
US-2018223153-A1 · Aug 9, 2018 · US
Cement slurries, cured cement and methods of making and use thereof
US-2018222797-A1 · Aug 9, 2018 · US
Development of anti-bit balling fluids
US-2018223161-A1 · Aug 9, 2018 · US
Emulsifier compositions for invert emulsion fluids and methods of using the same
US-2018223165-A1 · Aug 9, 2018 · US
Segregating fluids, methods of making, and methods of use
US-9994756-B2 · Jun 12, 2018 · US
Well cementing compositions and methods
US-2018148630-A1 · May 31, 2018 · US
Compositions and methods for completing subterranean wells
US-9938447-B2 · Apr 10, 2018 · US
Compositions and methods for servicing subterranean wells
US-2018044569-A1 · Feb 15, 2018 · US
Wellbore additives that include liquid-infiltrated porous silica
US-2018037796-A1 · Feb 8, 2018 · US
Compositions containing kiln dust and/or biowaste ash and methods of use
US-9809737-B2 · Nov 7, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/424?
- CPC C09K8/424 is the Cooperative Patent Classification code for “using "spacer" compositions.”
- How many patents are filed under CPC C09K8/424 (using "spacer" compositions)?
- Our database includes 223 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/424 growing?
- Publication counts under this code: 9 in 2024 vs 8 in 2025 (latest complete years).