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with a tube bundle between an upper and a lower drum in the convection pass

with a tube bundle between an upper and a lower drum in the convection pass · 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	F22B21/345
Official title	{with a tube bundle between an upper and a lower drum in the convection pass}
Display label	with a tube bundle between an upper and a lower drum in the convection pass
Total patents	5

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

Filing activity appears to be growing based on the most recent years.

Patents filed per year
Year	Patents
2016	2
2017	3

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