US3313091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cycle adsorption
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1963-11-04
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Granted: 1967-04-11
•
Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Norton H Berlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D53/0476; B01D53/0473; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2253/25; B01D2256/00; B01D2256/12; B01D2257/00; B01D2257/10; B01D2257/102; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40035; B01D2259/40037; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/40058; B01D2259/40066; B01D2259/40077; B01D2259/40081; B01D2259/402; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF OBTAINING OXYGEN-ENRICHED AIR WHICH COMPRISES INTRODUCING AIR INTO A ZONE FILLED WITH A TYPE X MOLECULAR SIEVE HAVING 30 TO 100% OF ITS NORMAL SODIUM CATION REPLACED BY SR++ CATION AT A TEMPERATURE OF -10*F. TO 110*F. AND A PRESSURE WHICH IS AT LEAST ATMOSPHERIC, THEREBY PREFERENTIALLY ABSORBING NITROGEN, REMOVING FROM SAID ZONE AS PRIMARY EFFUENT STREAM OXYGEN-ENRICHED AIR CONTAINING 25 TO 93% OXYGEN, THEREFORE DESORBING ADSORBED NITROGEN FROM SAID MOLECULAR SIEVE
Claim 2
Independent Claim
75 words
A METHOD OF OBTAINING OXYGEN-ENRICHED AIR WHICH COMPRISES INTRODUCING AIR INTO A ZONE FILLED WITH A TYPE X MOLECULAR SIEVE HAVING 30 TO 100% OF ITS NORMAL SODIUM CATION REPLACED BY SR++ CATION AT A TEMPERATURE OF -10*F. TO 110*F. AND A PRESSURE WHICH IS AT LEAST ATMOSPHERIC, THEREBY PREFERENTIALLY ABSORBING NITROGEN, REMOVING FROM SAID ZONE AS PRIMARY EFFUENT STREAM OXYGEN-ENRICHED AIR CONTAINING 25 TO 93% OXYGEN, THEREFORE DESORBING ADSORBED NITROGEN FROM SAID MOLECULAR SIEVE
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |