PatentsDB

Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof

Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof · 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 codeC01B21/0935
Official title{Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof}
Display labelImidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof
Total patents50

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
20153
20162
20173
20184
20193
20201
20215
20225
20236
20249
20256
20263

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 C01B21/0935?
CPC C01B21/0935 is the Cooperative Patent Classification code for “Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof.”
How many patents are filed under CPC C01B21/0935 (Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof)?
Our database includes 50 publications tagged with this CPC code.
Is patent activity under CPC C01B21/0935 growing?
Publication counts under this code: 9 in 2024 vs 6 in 2025 (latest complete years).