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porous or hollow

porous or hollow · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeC04B14/301
Official title{porous or hollow}
Display labelporous or hollow
Total patents13

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20155
20164
20171
20192
20201

Representative patents

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