US3140933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of an oxygen-nitrogen mixture
Assignee: Union Carbide Corp
•
Filing: 1960-12-02
•
Granted: 1964-07-14
•
Expires: 1980-12-02
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:24
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C; C01; C01B; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/045; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2256/00; B01D2256/10; B01D2256/12; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/104; C01B2210/00; C01B2210/0043; C01B2210/0046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR SEPARATING AN OXYGEN-NITROGEN MIXTURE INTO ITS COMPONENTS COMPRISING THE STEPS OF PROVIDING AN OXYGEN-NITROGEN CONTAINING FEED GAS MIXTURE AT A FEED PRESSURE BETWEEN 0.5 AND 5 ATMOSPHERES ABSOLUTE, CONTACTING SUCH FEED GAS WITH A BED OF CRYSTALLINE ZEOLITIC MOLECULAR SIEVE MATERIAL HAVING APPARENT PORE SIZES OF AT LEAST 4 ANGSTROMS AND HAVING LITHIUM AS AT LEAST ONE CATION CONSTITUENT AT A TEMPERATURE BETWEEN ABOUT 30* AND -150*C. THEREBY ADSORBING NITROGEN FROM THE GAS MIXTURE, AND DISCHARGING AN OXYGEN-ENRICHED PRODUCT GAS FROM SUCH BED.
Claim 2
Dependent Claim
86 words
A PROCESS FOR SEPARATING AN OXYGEN-NITROGEN MIXTURE INTO ITS COMPONENTS COMPRISING THE STEPS OF PROVIDING AN OXYGEN-NITROGEN CONTAINING FEED GAS MIXTURE AT A FEED PRESSURE BETWEEN 0.5 AND 5 ATMOSPHERES ABSOLUTE, CONTACTING SUCH FEED GAS WITH A BED OF CRYSTALLINE ZEOLITIC MOLECULAR SIEVE MATERIAL HAVING APPARENT PORE SIZES OF AT LEAST 4 ANGSTROMS AND HAVING LITHIUM AS AT LEAST ONE CATION CONSTITUENT AT A TEMPERATURE BETWEEN ABOUT 30* AND -150*C. THEREBY ADSORBING NITROGEN FROM THE GAS MIXTURE, AND DISCHARGING AN OXYGEN-ENRICHED PRODUCT GAS FROM SUCH BED.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |