What is CPC F04C27/009?

CPC F04C27/009 is the Cooperative Patent Classification code for “Shaft sealings specially adapted for pumps.”

How many patents are filed under CPC F04C27/009 (Shaft sealings specially adapted for pumps)?

Our database includes 95 publications tagged with this CPC code.

Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).

Shaft sealings specially adapted for pumps · Cooperative Patent Classification (CPC)

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

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F04C27/009
Official title	{Shaft sealings specially adapted for pumps}
Display label	Shaft sealings specially adapted for pumps
Total patents	95

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

Filing activity over the last five years is declining.

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

Answers are generated from the same data shown on this page.

What is CPC F04C27/009?: CPC F04C27/009 is the Cooperative Patent Classification code for “Shaft sealings specially adapted for pumps.”
How many patents are filed under CPC F04C27/009 (Shaft sealings specially adapted for pumps)?: Our database includes 95 publications tagged with this CPC code.
Is patent activity under CPC F04C27/009 growing?: Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).