Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence)

Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence) · 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 codeC09J167/04
Official titlePolyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence)
Display labelPolyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence)
Total patents139

Filing trend

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

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
20159
201612
201721
201813
201913
202013
202111
20223
202312
202413
202514
20265

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 C09J167/04?
CPC C09J167/04 is the Cooperative Patent Classification code for “Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence).”
How many patents are filed under CPC C09J167/04 (Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09J167/06 takes precedence))?
Our database includes 139 publications tagged with this CPC code.
Is patent activity under CPC C09J167/04 growing?
Publication counts under this code: 13 in 2024 vs 14 in 2025 (latest complete years).