Method for producing high-purity hydrochloric acid
US-2025333304-A1 · Oct 30, 2025 · US
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Making ultrapure specific gas
Making ultrapure specific gas · 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 | C01B2210/0042 |
| Official title | Making ultrapure specific gas |
| Display label | Making ultrapure specific gas |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydrogen separation filter and method for manufacturing hydrogen separation filter
US-12371321-B2 · Jul 29, 2025 · US
Production method for high-purity hydrogen chloride gas
US-12312247-B2 · May 27, 2025 · US
Purification apparatus and purification method for non-metal semiconductor material
US-2024228286-A1 · Jul 11, 2024 · US
Process for separation of hydrogen and oxygen
US-11850546-B2 · Dec 26, 2023 · US
Helium recovery process
US-2023382735-A1 · Nov 30, 2023 · US
Hydrogen separation filter and method for manufacturing hydrogen separation filter
US-2023212008-A1 · Jul 6, 2023 · US
Production method for high-purity hydrogen chloride gas
US-2022411265-A1 · Dec 29, 2022 · US
Purification of carbon monoxide by cryogenic distillation
US-2022282913-A1 · Sep 8, 2022 · US
Process for separation of hydrogen and oxygen
US-2022152548-A1 · May 19, 2022 · US
Process for separation of hydrogen and oxygen
US-11285428-B2 · Mar 29, 2022 · US
Process for separation of hydrogen and oxygen
US-2020353403-A1 · Nov 12, 2020 · US
Gas purifier
US-10245554-B2 · Apr 2, 2019 · US
Gas Purifier
US-2017333841-A1 · Nov 23, 2017 · US
Gas purifier
US-9694319-B2 · Jul 4, 2017 · US
Gas Purifier
US-2015056113-A1 · Feb 26, 2015 · US