Six-membered rings

Six-membered rings · 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 codeC07D291/06
Official titleSix-membered rings
Display labelSix-membered rings
Total patents75

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20153
20164
20173
201814
20199
202018
20219
20221
20238
20243
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 C07D291/06?
CPC C07D291/06 is the Cooperative Patent Classification code for “Six-membered rings.”
How many patents are filed under CPC C07D291/06 (Six-membered rings)?
Our database includes 75 publications tagged with this CPC code.
Is patent activity under CPC C07D291/06 growing?
Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).