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US3359705A
Expired / Lapsed
US
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Oxygen permeable membranes
Assignee: Union Carbide Corp
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Filing: 1966-10-27
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Granted: 1967-12-26
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Mullhaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/02; B01D71/022; B01D67/00; B01D67/0039; B01D67/0069; B01D67/0072; B01D2323/00; B01D2323/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PROCESS FOR SEPARATING OXYGEN FROM AIR IN WHICH AIR AT ELEVATED TEMPERATURE IS BROUGHT INTO PRESSURE CONTACT WITH ONE SURFACE OF A THIN METALLIC MEMBRANE WHILE MAINTAINING A SUBSTGANTIALLY LOWER PRESSURE ON THE CONVERSE SIDE OF THE SAID MEMBRANE, WHEREBY OXYGEN SELECTIVELY PERMEATES THROUGH THE SAID MEMBRANE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE METAL PERMEATION MEMBRANE A THIN FILM OF AN ALLOY CONSISTING OF AT LEAST 80 ATOM-PERCENT SLVER AND NOT GREATER THAN 99.8 ATOM-PERCENT SILVER WITH AT LEAST ONE OTHER TRANSITION METAL HAVING FROM 8 TO 10 INCLUSIVE ELECTRONS IN THE OUTERMOST OCCUPIED D SHELL THEREOF.
Claim 2
Dependent Claim
100 words
IN THE PROCESS FOR SEPARATING OXYGEN FROM AIR IN WHICH AIR AT ELEVATED TEMPERATURE IS BROUGHT INTO PRESSURE CONTACT WITH ONE SURFACE OF A THIN METALLIC MEMBRANE WHILE MAINTAINING A SUBSTGANTIALLY LOWER PRESSURE ON THE CONVERSE SIDE OF THE SAID MEMBRANE, WHEREBY OXYGEN SELECTIVELY PERMEATES THROUGH THE SAID MEMBRANE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE METAL PERMEATION MEMBRANE A THIN FILM OF AN ALLOY CONSISTING OF AT LEAST 80 ATOM-PERCENT SLVER AND NOT GREATER THAN 99.8 ATOM-PERCENT SILVER WITH AT LEAST ONE OTHER TRANSITION METAL HAVING FROM 8 TO 10 INCLUSIVE ELECTRONS IN THE OUTERMOST OCCUPIED D SHELL THEREOF.
References Cited (Backward Citations)
US3155467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |