Deactivation and activation of permeability modifiers for use in subterranean formation operations
US-9840659-B2 · Dec 12, 2017 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C09K8/60 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 247 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 30 |
| 2016 | 22 |
| 2017 | 43 |
| 2018 | 23 |
| 2019 | 26 |
| 2020 | 30 |
| 2021 | 22 |
| 2022 | 19 |
| 2023 | 8 |
| 2024 | 12 |
| 2025 | 11 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Shear recovery for viscosifying surfactants in stimulation fluids
US-2017342313-A1 · Nov 30, 2017 · US
Compositions for treating subterranean formations
US-9828540-B2 · Nov 28, 2017 · US
Alkylated Polyetheramines as Clay Stabilizing Agents
US-2017306210-A1 · Oct 26, 2017 · US
Methods and compositions to use shape changing polymers in subterranean formations
US-9725635-B2 · Aug 8, 2017 · US
Alkylated polyetheramines as clay stabilizing agents
US-9719007-B2 · Aug 1, 2017 · US
Friction reducer compositions
US-9701883-B2 · Jul 11, 2017 · US
Using synthetic acid compositions as alternatives to conventional acids in the oil and gas industry
US-2017096596-A1 · Apr 6, 2017 · US
Deactivation and activation of permeability modifiers for use in subterranean formation operations
US-2016369160-A1 · Dec 22, 2016 · US
Downhole structures including soluble glass
US-2016369154-A1 · Dec 22, 2016 · US
Fluids and methods for treating hydrocarbon-bearing formations
US-2016347985-A1 · Dec 1, 2016 · US
Altering the interface of hydrocarbon-coated surfaces
US-9499842-B2 · Nov 22, 2016 · US
Fluid compositions and methods of using nanomaterial hybrids
US-2016326421-A1 · Nov 10, 2016 · US
Methods and Compositions to use Shape Changing Polymers in Subterranean Formations
US-2016312098-A1 · Oct 27, 2016 · US
Perfluoro phosphate-type gas pipeline drag-reducing agent and method of preparing same
US-2016305612-A1 · Oct 20, 2016 · US
Subterranean treatment with compositions including hexaaquaaluminum trihalide
US-2016272871-A1 · Sep 22, 2016 · US
Methods and systems for acidizing subterranean formations
US-2016264852-A1 · Sep 15, 2016 · US
Quaternized fatty amines, amidoamines and their derivatives from natural oil metathesis
US-9416099-B2 · Aug 16, 2016 · US
Compositions for treating subterranean formations
US-2016230066-A1 · Aug 11, 2016 · US
Development and characterization of degradable cross-linking in polyvinyl alcohol
US-2016215203-A1 · Jul 28, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/60?
- CPC C09K8/60 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C09K8/60 (Chemistry & Metallurgy)?
- Our database includes 247 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/60 growing?
- Publication counts under this code: 12 in 2024 vs 11 in 2025 (latest complete years).