What is CPC F04C27/00?

CPC F04C27/00 is the Cooperative Patent Classification code for “Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids.”

How many patents are filed under CPC F04C27/00 (Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids)?

Our database includes 158 publications tagged with this CPC code.

Publication counts under this code: 14 in 2024 vs 18 in 2025 (latest complete years).

Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids · 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	F04C27/00
Official title	Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Display label	Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Total patents	158

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 F04C27/00?: CPC F04C27/00 is the Cooperative Patent Classification code for “Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids.”
How many patents are filed under CPC F04C27/00 (Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids)?: Our database includes 158 publications tagged with this CPC code.
Is patent activity under CPC F04C27/00 growing?: Publication counts under this code: 14 in 2024 vs 18 in 2025 (latest complete years).