Process for the purification of hydrogen cyanide
US-11939281-B2 · Mar 26, 2024 · US
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Purification
Purification · 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 | C01C3/0295 |
| Official title | {Purification} |
| Display label | Purification |
| Total patents | 7 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 2 |
| 2020 | 2 |
| 2021 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the purification of hydrogen cyanide
US-2021269396-A1 · Sep 2, 2021 · US
High purity HCN from acrylonitrile co-production
US-10647663-B2 · May 12, 2020 · US
Method for removing nitriles from hydrogen cyanide
US-10562782-B2 · Feb 18, 2020 · US
High purity hcn from acrylonitrile co-production
US-2018208548-A1 · Jul 26, 2018 · US
Method for removing nitriles from hydrogen cyanide
US-2018194640-A1 · Jul 12, 2018 · US
Process for heat recovery from ammonia stripper in andrussow process
US-2016068404-A1 · Mar 10, 2016 · US