What is CPC F04B53/108?

CPC F04B53/108 is the Cooperative Patent Classification code for “Valves characterised by the material.”

How many patents are filed under CPC F04B53/108 (Valves characterised by the material)?

Our database includes 43 publications tagged with this CPC code.

Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).

Valves characterised by the material · 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	F04B53/108
Official title	{Valves characterised by the material}
Display label	Valves characterised by the material
Total patents	43

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

Filing activity over the last five years is rapidly 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 F04B53/108?: CPC F04B53/108 is the Cooperative Patent Classification code for “Valves characterised by the material.”
How many patents are filed under CPC F04B53/108 (Valves characterised by the material)?: Our database includes 43 publications tagged with this CPC code.
Is patent activity under CPC F04B53/108 growing?: Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).