Esters containing sulfur

Esters containing sulfur · 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 codeC08F20/38
Official titleEsters containing sulfur
Display labelEsters containing sulfur
Total patents256

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
201617
201732
201830
201933
202030
202120
202222
202311
202422
202516
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 C08F20/38?
CPC C08F20/38 is the Cooperative Patent Classification code for “Esters containing sulfur.”
How many patents are filed under CPC C08F20/38 (Esters containing sulfur)?
Our database includes 256 publications tagged with this CPC code.
Is patent activity under CPC C08F20/38 growing?
Publication counts under this code: 22 in 2024 vs 16 in 2025 (latest complete years).