the condition being a liquid level or a lack of liquid supply

the condition being a liquid level or a lack of liquid supply · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeF04D15/0218
Official title{the condition being a liquid level or a lack of liquid supply}
Display labelthe condition being a liquid level or a lack of liquid supply
Total patents150

Filing trend

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

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
20155
20169
201723
20187
201913
20205
202111
202214
202322
202419
202521
20261

Representative patents

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

Frequently asked questions

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

What is CPC F04D15/0218?
CPC F04D15/0218 is the Cooperative Patent Classification code for “the condition being a liquid level or a lack of liquid supply.”
How many patents are filed under CPC F04D15/0218 (the condition being a liquid level or a lack of liquid supply)?
Our database includes 150 publications tagged with this CPC code.
Is patent activity under CPC F04D15/0218 growing?
Publication counts under this code: 19 in 2024 vs 21 in 2025 (latest complete years).