in which the condensed system contains four or more hetero rings

in which the condensed system contains four or more hetero 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 codeC07D487/22
Official titlein which the condensed system contains four or more hetero rings
Display labelin which the condensed system contains four or more hetero rings
Total patents727

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
201562
201658
201766
201846
201969
202073
202165
202271
202374
202478
202550
202615

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 C07D487/22?
CPC C07D487/22 is the Cooperative Patent Classification code for “in which the condensed system contains four or more hetero rings.”
How many patents are filed under CPC C07D487/22 (in which the condensed system contains four or more hetero rings)?
Our database includes 727 publications tagged with this CPC code.
Is patent activity under CPC C07D487/22 growing?
Publication counts under this code: 78 in 2024 vs 50 in 2025 (latest complete years).