What is CPC D03D15/33?

CPC D03D15/33 is the Cooperative Patent Classification code for “Ultrafine fibres, e.g. microfibres or nanofibres.”

How many patents are filed under CPC D03D15/33 (Ultrafine fibres, e.g. microfibres or nanofibres)?

Our database includes 73 publications tagged with this CPC code.

Publication counts under this code: 9 in 2024 vs 12 in 2025 (latest complete years).

Ultrafine fibres, e.g. microfibres or nanofibres · Cooperative Patent Classification (CPC)

Textile and paper production, treatment, and products.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	D03D15/33
Official title	Ultrafine fibres, e.g. microfibres or nanofibres
Display label	Ultrafine fibres, e.g. microfibres or nanofibres
Total patents	73

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

Filing activity over the last five years is stable.

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 D03D15/33?: CPC D03D15/33 is the Cooperative Patent Classification code for “Ultrafine fibres, e.g. microfibres or nanofibres.”
How many patents are filed under CPC D03D15/33 (Ultrafine fibres, e.g. microfibres or nanofibres)?: Our database includes 73 publications tagged with this CPC code.
Is patent activity under CPC D03D15/33 growing?: Publication counts under this code: 9 in 2024 vs 12 in 2025 (latest complete years).