with alkali or alkaline earth metals

with alkali or alkaline earth metals · 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 codeC09K11/628
Official title{with alkali or alkaline earth metals}
Display labelwith alkali or alkaline earth metals
Total patents66

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
20167
20175
20184
20198
20202
202111
202212
20236
20243
20253

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 C09K11/628?
CPC C09K11/628 is the Cooperative Patent Classification code for “with alkali or alkaline earth metals.”
How many patents are filed under CPC C09K11/628 (with alkali or alkaline earth metals)?
Our database includes 66 publications tagged with this CPC code.
Is patent activity under CPC C09K11/628 growing?
Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).