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for screw-threaded joints

for screw-threaded joints · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Related technology areas

Mapped technology topics for this CPC code.

Mechanical Engineering

CPC classification statistics
Metric	Value
CPC code	F16L25/021
Official title	{for screw-threaded joints}
Display label	for screw-threaded joints
Total patents	21

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is stable.

Patents filed per year
Year	Patents
2015	6
2016	2
2017	2
2018	2
2019	2
2020	3
2021	2
2022	2

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Sealed gap sub
US-11280437-B2 · Mar 22, 2022 · US
Electrical isolator
US-11264153-B2 · Mar 1, 2022 · US
Threaded connections for tubular members
US-11204115-B2 · Dec 21, 2021 · US
Apparatus and methods for connecting a first electrically conductive tube and a second electrically conductive tube
US-11098828-B2 · Aug 24, 2021 · US
Electrical isolator
US-2020321148-A1 · Oct 8, 2020 · US
Apparatus and methods for connecting a first electrically conductive tube and a second electrically conductive tube
US-2020182384-A1 · Jun 11, 2020 · US
Threaded connections for tubular members
US-2020025318-A1 · Jan 23, 2020 · US
Sealed gap sub
US-2019316712-A1 · Oct 17, 2019 · US
Electromagnetic telemetry gap sub assembly with insulating collar
US-10400520-B2 · Sep 3, 2019 · US
Electromagnetic telemetry gap sub assembly with insulating collar
US-2018148984-A1 · May 31, 2018 · US
Electromagnetic telemetry gap sub assembly with insulating collar
US-9909369-B2 · Mar 6, 2018 · US
Dielectric isolators
US-9618148-B2 · Apr 11, 2017 · US
Apparatus and method for coaxially joining components to resist relative rotational and longitudinal movement
US-9587441-B2 · Mar 7, 2017 · US
Electrical connectivity across a tool joint
US-2016376849-A1 · Dec 29, 2016 · US
Threaded coupling device with nozzle for GWR measurements in non-metallic tanks
US-9518856-B2 · Dec 13, 2016 · US
Electromagnetic telemetry gap sub assembly with insulating collar
US-2015330155-A1 · Nov 19, 2015 · US
Apparatus and method for coaxially joining components to resist relative rotational and longitudinal movement
US-2015292274-A1 · Oct 15, 2015 · US
Threaded coupling device with nozzle for gwr measurements in non-metallic tanks
US-2015276458-A1 · Oct 1, 2015 · US
Dielectric Isolators
US-2015123394-A1 · May 7, 2015 · US
Fluid Flow Regulating Device Having High Resistance To Corrosion
US-2015115185-A1 · Apr 30, 2015 · US