containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)}

containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)} · 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 codeC12P17/18
Official titlecontaining at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)}
Display labelcontaining at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)}
Total patents78

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
20154
20168
20177
20187
201910
202010
202111
20227
20238
20244
20252

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 C12P17/18?
CPC C12P17/18 is the Cooperative Patent Classification code for “containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)}.”
How many patents are filed under CPC C12P17/18 (containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin {(e.g. Rifamycin C12P17/189)})?
Our database includes 78 publications tagged with this CPC code.
Is patent activity under CPC C12P17/18 growing?
Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).