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

containing oxygen {(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 codeC11D3/20
Official titlecontaining oxygen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}
Display labelcontaining oxygen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}
Total patents159

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20158
201619
201718
201829
201924
202014
202112
20229
20239
202410
20257

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 C11D3/20?
CPC C11D3/20 is the Cooperative Patent Classification code for “containing oxygen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)}.”
How many patents are filed under CPC C11D3/20 (containing oxygen {(C11D3/162, C11D3/164, C11D3/166, C11D3/168 take precedence)})?
Our database includes 159 publications tagged with this CPC code.
Is patent activity under CPC C11D3/20 growing?
Publication counts under this code: 10 in 2024 vs 7 in 2025 (latest complete years).