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Closure devices for pour holes

Closure devices for pour holes · Cooperative Patent Classification (CPC)

Separating, mixing, shaping, printing, and transporting materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	B29C44/581
Official title	{Closure devices for pour holes}
Display label	Closure devices for pour holes
Total patents	4

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

Filing activity appears to be declining based on the most recent years.

Patents filed per year
Year	Patents
2017	3
2018	1

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