to two ring carbon atoms

to two ring carbon atoms · 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 codeC07D251/22
Official titleto two ring carbon atoms
Display labelto two ring carbon atoms
Total patents69

Filing trend

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

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
20158
20164
20178
20184
20196
20202
20215
20224
20238
20249
20259
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 C07D251/22?
CPC C07D251/22 is the Cooperative Patent Classification code for “to two ring carbon atoms.”
How many patents are filed under CPC C07D251/22 (to two ring carbon atoms)?
Our database includes 69 publications tagged with this CPC code.
Is patent activity under CPC C07D251/22 growing?
Publication counts under this code: 9 in 2024 vs 9 in 2025 (latest complete years).