at an oxygen percentage above that of air

at an oxygen percentage above that of air · 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 codeC04B2235/6585
Official titleat an oxygen percentage above that of air
Display labelat an oxygen percentage above that of air
Total patents179

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
201527
201623
201729
201819
20197
202015
202112
202214
202317
20247
20257
20262

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 C04B2235/6585?
CPC C04B2235/6585 is the Cooperative Patent Classification code for “at an oxygen percentage above that of air.”
How many patents are filed under CPC C04B2235/6585 (at an oxygen percentage above that of air)?
Our database includes 179 publications tagged with this CPC code.
Is patent activity under CPC C04B2235/6585 growing?
Publication counts under this code: 7 in 2024 vs 7 in 2025 (latest complete years).