Activation system for pipeline plug
US-12338934-B2 · Jun 24, 2025 · US
the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like
the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16L55/136 |
| Official title | the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like |
| Display label | the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 3 |
| 2017 | 1 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gripper assembly for pipeline isolation tool and methods of use
US-12292151-B2 · May 6, 2025 · US
Completion plug safety indicator and method for its use
US-12104738-B2 · Oct 1, 2024 · US
Seal assembly for pipeline isolation tool and methods of use
US-12092255-B2 · Sep 17, 2024 · US
Fastening of a cover to a housing
US-11976727-B2 · May 7, 2024 · US
Completion Plug Safety Indicator And Method For Its Use
US-2024110656-A1 · Apr 4, 2024 · US
Shaft mechanical lock for pipeline isolation tools
US-11346485-B2 · May 31, 2022 · US
Mechanical flow assembly
US-11203912-B2 · Dec 21, 2021 · US
Trigger mechanism for a valve assembly
US-11112016-B2 · Sep 7, 2021 · US
Fastening of a cover to a housing
US-2021254713-A1 · Aug 19, 2021 · US
Mechanical Flow Assembly
US-2021079755-A1 · Mar 18, 2021 · US
Shaft Mechanical Lock for Pipeline Isolation Tools
US-2021071799-A1 · Mar 11, 2021 · US
Shaft mechanical lock for pipeline isolation tools
US-10774970-B2 · Sep 15, 2020 · US
Shaft Mechanical Lock For Pipeline Isolation Tools
US-2020124222-A1 · Apr 23, 2020 · US
Trigger mechanism for a valve assembly
US-2020056708-A1 · Feb 20, 2020 · US
Large diameter pipe plug
US-9556997-B2 · Jan 31, 2017 · US
Pipe-closing device for isolating a tank, a pipe or a set of tanks and pipes
US-9463923-B2 · Oct 11, 2016 · US
Masking plug
US-9415411-B2 · Aug 16, 2016 · US
Pipe-closing device for isolating a tank, a pipe or a set of tanks and pipes
US-2016031638-A1 · Feb 4, 2016 · US
Large Diameter Pipe Plug
US-2015292667-A1 · Oct 15, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16L55/136?
- CPC F16L55/136 is the Cooperative Patent Classification code for “the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like.”
- How many patents are filed under CPC F16L55/136 (the closure device being a plug fixed by radially expanding or deforming a split ring, hooks or the like)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC F16L55/136 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).