of hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups

of hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups · 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 codeC07C251/52
Official titleof hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups
Display labelof hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups
Total patents28

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
20152
20164
20175
20181
20192
20202
20211
20222
20236
20241
20252

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 C07C251/52?
CPC C07C251/52 is the Cooperative Patent Classification code for “of hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups.”
How many patents are filed under CPC C07C251/52 (of hydrocarbon radicals substituted by halogen atoms or by nitro or nitroso groups)?
Our database includes 28 publications tagged with this CPC code.
Is patent activity under CPC C07C251/52 growing?
Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).