the hetero ring containing only oxygen as ring hetero atoms

the hetero ring containing only oxygen as ring hetero atoms · 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 codeC07H9/02
Official titlethe hetero ring containing only oxygen as ring hetero atoms
Display labelthe hetero ring containing only oxygen as ring hetero atoms
Total patents39

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
20153
20166
20173
20185
20194
20203
20212
20224
20233
20243
20253

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 C07H9/02?
CPC C07H9/02 is the Cooperative Patent Classification code for “the hetero ring containing only oxygen as ring hetero atoms.”
How many patents are filed under CPC C07H9/02 (the hetero ring containing only oxygen as ring hetero atoms)?
Our database includes 39 publications tagged with this CPC code.
Is patent activity under CPC C07H9/02 growing?
Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).