Filter cake removal composition for drilling fluids and method of use thereof
US-2016376491-A1 · Dec 29, 2016 · US
inorganic depositions, e.g. sulfates or carbonates
inorganic depositions, e.g. sulfates or carbonates · 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 | C09K8/528 |
| Official title | inorganic depositions, e.g. sulfates or carbonates |
| Display label | inorganic depositions, e.g. sulfates or carbonates |
| Total patents | 879 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 39 |
| 2016 | 49 |
| 2017 | 94 |
| 2018 | 92 |
| 2019 | 96 |
| 2020 | 81 |
| 2021 | 89 |
| 2022 | 90 |
| 2023 | 88 |
| 2024 | 75 |
| 2025 | 60 |
| 2026 | 26 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Removal of inorganic deposition from high temperature formations with non-corrosive acidic pH fluids
US-9512348-B2 · Dec 6, 2016 · US
Method
US-2016333250-A1 · Nov 17, 2016 · US
Breaker and displacement fluid
US-9493697-B2 · Nov 15, 2016 · US
Clean-up fluid for wellbore particles containing an environmentally-friendly surfactant
US-2016319181-A1 · Nov 3, 2016 · US
Vapor-depositing metal oxide on surfaces for wells or pipelines to reduce scale
US-2016290103-A1 · Oct 6, 2016 · US
Double hydrophilic block copolymer on surfaces for wells or pipelines to reduce scale
US-2016289535-A1 · Oct 6, 2016 · US
Diphenyliodonium salts as sulfidogenesis inhibitors and antimicrobials
US-2016222762-A1 · Aug 4, 2016 · US
Dual purpose viscosifier-scale inhibitors for use in subterranean formation operations
US-2016168456-A1 · Jun 16, 2016 · US
Methods of designing an invert emulsion fluid having high associative stability
US-2016168444-A1 · Jun 16, 2016 · US
Methods and systems for removing geothermal scale
US-2016160111-A1 · Jun 9, 2016 · US
Solids-free diverting agents and methods related thereto
US-2016160108-A1 · Jun 9, 2016 · US
Asphaltene-dissolving oil-external emulsion for acidization and methods of using the same
US-2016145487-A1 · May 26, 2016 · US
Drilling fluid composition including viscosifier and method of using the same
US-2016122613-A1 · May 5, 2016 · US
Process to Treat Subterranean Formations Using a Chelating Agent
US-2016115376-A1 · Apr 28, 2016 · US
Low molecular weight polyacrylates for eor
US-2016115371-A1 · Apr 28, 2016 · US
Infused and coated proppant containing chemical treatment agents and methods of using same
US-2016075941-A1 · Mar 17, 2016 · US
Scale-inhibiting polymers and methods for preventing scale formation
US-2016060147-A1 · Mar 3, 2016 · US
Treatment fluids comprising an alkali metal complexing agent and methods for use thereof
US-2016040060-A1 · Feb 11, 2016 · US
Methods and systems for infusing porous ceramic proppant with a chemical treatment agent
US-2016032177-A1 · Feb 4, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/528?
- CPC C09K8/528 is the Cooperative Patent Classification code for “inorganic depositions, e.g. sulfates or carbonates.”
- How many patents are filed under CPC C09K8/528 (inorganic depositions, e.g. sulfates or carbonates)?
- Our database includes 879 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/528 growing?
- Publication counts under this code: 75 in 2024 vs 60 in 2025 (latest complete years).