with nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines

with nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines · 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 codeC07D251/18
Official titlewith nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines
Display labelwith nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines
Total patents110

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
20158
201612
201725
201810
201913
202012
20217
20229
20234
20247
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 C07D251/18?
CPC C07D251/18 is the Cooperative Patent Classification code for “with nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines.”
How many patents are filed under CPC C07D251/18 (with nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines)?
Our database includes 110 publications tagged with this CPC code.
Is patent activity under CPC C07D251/18 growing?
Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).