Radicals substituted by nitrogen atoms

Radicals substituted by nitrogen 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 codeC07D277/28
Official titleRadicals substituted by nitrogen atoms
Display labelRadicals substituted by nitrogen atoms
Total patents305

Filing trend

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

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
201555
201653
201737
201830
201924
202023
202117
202215
202316
202413
202517
20265

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 C07D277/28?
CPC C07D277/28 is the Cooperative Patent Classification code for “Radicals substituted by nitrogen atoms.”
How many patents are filed under CPC C07D277/28 (Radicals substituted by nitrogen atoms)?
Our database includes 305 publications tagged with this CPC code.
Is patent activity under CPC C07D277/28 growing?
Publication counts under this code: 13 in 2024 vs 17 in 2025 (latest complete years).