Zirconium or hafnium oxide

Zirconium or hafnium oxide · 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 codeC04B35/62823
Official title{Zirconium or hafnium oxide}
Display labelZirconium or hafnium oxide
Total patents87

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20153
20165
20179
201810
201910
20204
202113
20226
202310
20249
20256
20262

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 C04B35/62823?
CPC C04B35/62823 is the Cooperative Patent Classification code for “Zirconium or hafnium oxide.”
How many patents are filed under CPC C04B35/62823 (Zirconium or hafnium oxide)?
Our database includes 87 publications tagged with this CPC code.
Is patent activity under CPC C04B35/62823 growing?
Publication counts under this code: 9 in 2024 vs 6 in 2025 (latest complete years).