US3238700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen diffusion process
Assignee: Engelhard Industries Inc
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Filing: 1962-04-20
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Granted: 1966-03-08
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Johann G E Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/02; B01D71/022; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR SEPARATING HYDROGEN FROM A MIXTURE OF GASES CONTAINING HYDROGEN WHICH PROCESS COMPRISES CONTACTING SAID GASEOUS MIXTURE WITH ONE SIDE OF A NONPOROUS SEPTUM COMPOSED OF PALLADIUM CONTAINING FROM ABOUT 1 TO ABOUT 10% BY WEIGHT RUTHENIUM, SAID SEPTUM BEING A SOLID SOLUTION OF RUTHENIUM IN PALLADIUM AT THE TEMPERATURE EMPLOYED FOR HYDROGEN DIFFUSION, CAUSING THE HYDROGEN TO DIFFUSE THROUGH SAID SEPTUM AND REMOVING HYDROGEN FROM THE OPPOSITE SIDE OF SAID SEPTUM.
Claim 2
Dependent Claim
74 words
A PROCESS FOR SEPARATING HYDROGEN FROM A MIXTURE OF GASES CONTAINING HYDROGEN WHICH PROCESS COMPRISES CONTACTING SAID GASEOUS MIXTURE WITH ONE SIDE OF A NONPOROUS SEPTUM COMPOSED OF PALLADIUM CONTAINING FROM ABOUT 1 TO ABOUT 10% BY WEIGHT RUTHENIUM, SAID SEPTUM BEING A SOLID SOLUTION OF RUTHENIUM IN PALLADIUM AT THE TEMPERATURE EMPLOYED FOR HYDROGEN DIFFUSION, CAUSING THE HYDROGEN TO DIFFUSE THROUGH SAID SEPTUM AND REMOVING HYDROGEN FROM THE OPPOSITE SIDE OF SAID SEPTUM.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |