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with double-wall tubes having a third fluid between these walls, e.g. helium for leak detection

with double-wall tubes having a third fluid between these walls, e.g. helium for leak detection · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F22B1/066
Official title	{with double-wall tubes having a third fluid between these walls, e.g. helium for leak detection}
Display label	with double-wall tubes having a third fluid between these walls, e.g. helium for leak detection
Total patents	3

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

Filing activity appears stable based on the most recent years.

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