Blowout-preventers (BOP) elastomer seals with improved self-healing
US-12448558-B2 · Oct 21, 2025 · US
specially adapted for sealing expandable pipes, e.g. of the non-hardening type
specially adapted for sealing expandable pipes, e.g. of the non-hardening type · 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 | C09K8/422 |
| Official title | {specially adapted for sealing expandable pipes, e.g. of the non-hardening type} |
| Display label | specially adapted for sealing expandable pipes, e.g. of the non-hardening type |
| Total patents | 29 |
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 | 2 |
| 2018 | 1 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multiphase particle, manufacturing process and use thereof
US-12297149-B2 · May 13, 2025 · US
Bop elastomer seals with improved self-healing
US-2023407161-A1 · Dec 21, 2023 · US
Nanosilica dispersion for thermally insulating packer fluid
US-11370955-B2 · Jun 28, 2022 · US
Method to attain full annular coverage during cementing or mud circulation
US-11286726-B2 · Mar 29, 2022 · US
Method to Attain Full Annular Coverage During Cementing or Mud Circulation
US-2021363836-A1 · Nov 25, 2021 · US
Multiphase particle, manufacturing process and use thereof
US-2021269360-A1 · Sep 2, 2021 · US
Nanosilica dispersion for thermally insulating packer fluid
US-11034881-B2 · Jun 15, 2021 · US
Wellbore isolation barrier including negative thermal expansion material
US-10975658-B2 · Apr 13, 2021 · US
Wellbore isolation barrier including negative thermal expansion material
US-2020362662-A1 · Nov 19, 2020 · US
Nanosilica Dispersion for Thermally Insulating Packer Fluid
US-2020263075-A1 · Aug 20, 2020 · US
Nanosilica dispersion for thermally insulating packer fluid
US-10683452-B2 · Jun 16, 2020 · US
High water and brine swell elastomeric compositions and method for making and using same
US-10604693-B2 · Mar 31, 2020 · US
Gellable, non-aqueous oil well treatment fluids comprising elastomeric maleic anhydride copolymers
US-10526458-B1 · Jan 7, 2020 · US
Nanosilica Dispersion for Thermally Insulating Packer Fluid
US-2019249067-A1 · Aug 15, 2019 · US
Elastomer characterization
US-2019226295-A1 · Jul 25, 2019 · US
Nanosilica Dispersion for Thermally Insulating Packer Fluid
US-2019194521-A1 · Jun 27, 2019 · US
Nanosilica dispersion for thermally insulating packer fluid
US-10316238-B2 · Jun 11, 2019 · US
Nanosilica Dispersion for Thermally Insulating Packer Fluid
US-2019078010-A1 · Mar 14, 2019 · US
Composite wellbore seal system with sensing and self-healing capabilities
US-10190370-B1 · Jan 29, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K8/422?
- CPC C09K8/422 is the Cooperative Patent Classification code for “specially adapted for sealing expandable pipes, e.g. of the non-hardening type.”
- How many patents are filed under CPC C09K8/422 (specially adapted for sealing expandable pipes, e.g. of the non-hardening type)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC C09K8/422 growing?
- Publication counts under this code: 1 in 2023 vs 2 in 2025 (latest complete years).