Heterocyclic compounds having sulfur in the ring

Heterocyclic compounds having sulfur in the ring · 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 codeC08K5/45
Official titleHeterocyclic compounds having sulfur in the ring
Display labelHeterocyclic compounds having sulfur in the ring
Total patents302

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
201517
201619
201722
201813
201928
202027
202137
202235
202333
202435
202530
20266

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 C08K5/45?
CPC C08K5/45 is the Cooperative Patent Classification code for “Heterocyclic compounds having sulfur in the ring.”
How many patents are filed under CPC C08K5/45 (Heterocyclic compounds having sulfur in the ring)?
Our database includes 302 publications tagged with this CPC code.
Is patent activity under CPC C08K5/45 growing?
Publication counts under this code: 35 in 2024 vs 30 in 2025 (latest complete years).