Method of cleaning an apparatus used in the concentration of a mineral acid
US-12441614-B2 · Oct 14, 2025 · US
This page is not indexed by search engines while we improve data quality.
Concentration {(C01B21/40 takes precedence)}
Concentration {(C01B21/40 takes precedence)} · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01B21/44 |
| Official title | Concentration {(C01B21/40 takes precedence)} |
| Display label | Concentration {(C01B21/40 takes precedence)} |
| Total patents | 3 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2023 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.