Esters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates}

Esters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates} · 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 codeC08F222/16
Official titleEsters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates}
Display labelEsters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates}
Total patents41

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
20161
20173
20185
20193
20207
20213
20224
20236
20244
20251

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 C08F222/16?
CPC C08F222/16 is the Cooperative Patent Classification code for “Esters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates}.”
How many patents are filed under CPC C08F222/16 (Esters having free carboxylic acid groups {, e.g. monoalkyl maleates or fumarates})?
Our database includes 41 publications tagged with this CPC code.
Is patent activity under CPC C08F222/16 growing?
Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).