containing at least two sulfo groups bound to the carbon skeleton

containing at least two sulfo groups bound to the carbon skeleton · 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 codeC07C309/05
Official titlecontaining at least two sulfo groups bound to the carbon skeleton
Display labelcontaining at least two sulfo groups bound to the carbon skeleton
Total patents60

Filing trend

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

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
20151
20168
20174
20188
20195
20204
20215
20228
20234
20243
20256
20264

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 C07C309/05?
CPC C07C309/05 is the Cooperative Patent Classification code for “containing at least two sulfo groups bound to the carbon skeleton.”
How many patents are filed under CPC C07C309/05 (containing at least two sulfo groups bound to the carbon skeleton)?
Our database includes 60 publications tagged with this CPC code.
Is patent activity under CPC C07C309/05 growing?
Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).