US3247648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hydrogen separation and purification
Assignee: Union Carbide Corp
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Filing: 1963-03-11
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Granted: 1966-04-26
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 David L Mckinley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:44
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; C01B2203/00; C01B2203/04; C01B2203/0405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR SEPARATING HYDROGEN FROM A GAS MIXTURE CONTAINING HYDROGEN AND AT LEAST ONE OTHER GAS WHICH METHOD COMPRISES THE STEPS OF DIRECTING A STREAM OF THE GAS MIXTURE TO A GAS DIFFUSION BARRIER HAVING A FOIL LAYER CONSISTING ESSENTIALLY OF AN ALLOY OF PALLADIUM AND SILVER HAVING FROM 5 WEIGHT PERCENT TO 8 WEIGHT PERCENT SILVER; MAINTAINING A HYDROGEN PRESSURE DIFFERENTIAL OF SUBSTANTIALLY 300 P.S.I.G. ACROSS SAID BARRIER AND A TEMPERATURE OF SUBSTANTIALLY 350*C. AT SAID BARRIER, WHEREBY HYDROGEN OF THE MIXTURE IS CONVERTED TO A DIFFUSIBLE STATE, DIFFUSED THROUGH THE FOIL LAYER OF SAID BARRIER AND THEN RECONVERTED TO ITS ORIGINAL STATE, SEPARATED FROM THE GAS MIXTURE.
Claim 2
Independent Claim
110 words
A METHOD FOR SEPARATING HYDROGEN FROM A GAS MIXTURE CONTAINING HYDROGEN AND AT LEAST ONE OTHER GAS WHICH METHOD COMPRISES THE STEPS OF DIRECTING A STREAM OF THE GAS MIXTURE TO A GAS DIFFUSION BARRIER HAVING A FOIL LAYER CONSISTING ESSENTIALLY OF AN ALLOY OF PALLADIUM AND SILVER HAVING FROM 5 WEIGHT PERCENT TO 8 WEIGHT PERCENT SILVER; MAINTAINING A HYDROGEN PRESSURE DIFFERENTIAL OF SUBSTANTIALLY 300 P.S.I.G. ACROSS SAID BARRIER AND A TEMPERATURE OF SUBSTANTIALLY 350*C. AT SAID BARRIER, WHEREBY HYDROGEN OF THE MIXTURE IS CONVERTED TO A DIFFUSIBLE STATE, DIFFUSED THROUGH THE FOIL LAYER OF SAID BARRIER AND THEN RECONVERTED TO ITS ORIGINAL STATE, SEPARATED FROM THE GAS MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |