at least one of the hetero rings does not contain nitrogen as ring hetero atom

at least one of the hetero rings does not contain nitrogen as ring hetero atom · 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 codeC07F9/65586
Official title{at least one of the hetero rings does not contain nitrogen as ring hetero atom}
Display labelat least one of the hetero rings does not contain nitrogen as ring hetero atom
Total patents493

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
201545
201642
201741
201852
201953
202046
202148
202239
202342
202441
202534
202610

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 C07F9/65586?
CPC C07F9/65586 is the Cooperative Patent Classification code for “at least one of the hetero rings does not contain nitrogen as ring hetero atom.”
How many patents are filed under CPC C07F9/65586 (at least one of the hetero rings does not contain nitrogen as ring hetero atom)?
Our database includes 493 publications tagged with this CPC code.
Is patent activity under CPC C07F9/65586 growing?
Publication counts under this code: 41 in 2024 vs 34 in 2025 (latest complete years).