containing nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}

containing nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take 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 codeC11D3/26
Official titlecontaining nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}
Display labelcontaining nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}
Total patents174

Filing trend

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

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
201516
201615
20177
201828
201915
202015
202112
202215
202314
202419
202512
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 C11D3/26?
CPC C11D3/26 is the Cooperative Patent Classification code for “containing nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}.”
How many patents are filed under CPC C11D3/26 (containing nitrogen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)})?
Our database includes 174 publications tagged with this CPC code.
Is patent activity under CPC C11D3/26 growing?
Publication counts under this code: 19 in 2024 vs 12 in 2025 (latest complete years).