US2773561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver-palladium film for separation and purification of hydrogen
Assignee: Atlantic Richfield Co
•
Filing: 1955-05-02
•
Granted: 1956-12-11
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 James B Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:33
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; B; B01; B01D; B01D53/00; B01D53/22; C01B2203/00; C01B2203/04; C01B2203/0405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE RECOVERY OF FREE HYDROGEN FROM A GASEOUS MIXTURE COMPRISING HYDROGEN AND OTHER GASES COMPRISING THE STEPS OF BRINGING SAID GASEOUS MIXTURE INTO CONTACT WITH ONE SIDE OF A THIN NON-POROUS FILM CONSISTING ESSENTIALLY OF A SILVER-PALLADIUM COMPOSITION CONTAINING FROM 10% TO 50% SILVER, CAUSING THE HYDROGEN OF SAID GASEOUS MIXTURE TO PERMEATE THROUGH SAID FILM AND REMOVING THE PERMEATED HYDROGEN FROM THE OPPOSITE SIDE OF SAID FILM.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE RECOVERY OF FREE HYDROGEN FROM A GASEOUS MIXTURE COMPRISING HYDROGEN AND OTHER GASES COMPRISING THE STEPS OF BRINGING SAID GASEOUS MIXTURE INTO CONTACT WITH ONE SIDE OF A THIN NON-POROUS FILM CONSISTING ESSENTIALLY OF A SILVER-PALLADIUM COMPOSITION CONTAINING FROM 10% TO 50% SILVER, CAUSING THE HYDROGEN OF SAID GASEOUS MIXTURE TO PERMEATE THROUGH SAID FILM AND REMOVING THE PERMEATED HYDROGEN FROM THE OPPOSITE SIDE OF SAID FILM.
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |