Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone

Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone · 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 codeC07D209/40
Official titleNitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone
Display labelNitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone
Total patents181

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
201521
201616
201726
201826
201923
202018
202110
202213
20239
202413
20256

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 C07D209/40?
CPC C07D209/40 is the Cooperative Patent Classification code for “Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone.”
How many patents are filed under CPC C07D209/40 (Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone)?
Our database includes 181 publications tagged with this CPC code.
Is patent activity under CPC C07D209/40 growing?
Publication counts under this code: 13 in 2024 vs 6 in 2025 (latest complete years).