Oxygen and nitrogen or sulfur and nitrogen atoms

Oxygen and nitrogen or sulfur and nitrogen 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 codeC07D231/44
Official titleOxygen and nitrogen or sulfur and nitrogen atoms
Display labelOxygen and nitrogen or sulfur and nitrogen atoms
Total patents89

Filing trend

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

Filing activity over the last five years is rapidly growing.

Patents filed per year
YearPatents
20153
20165
201712
20186
201911
202011
20214
20225
20239
20243
202513
20267

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 C07D231/44?
CPC C07D231/44 is the Cooperative Patent Classification code for “Oxygen and nitrogen or sulfur and nitrogen atoms.”
How many patents are filed under CPC C07D231/44 (Oxygen and nitrogen or sulfur and nitrogen atoms)?
Our database includes 89 publications tagged with this CPC code.
Is patent activity under CPC C07D231/44 growing?
Publication counts under this code: 3 in 2024 vs 13 in 2025 (latest complete years).