US3564816A
Expired / Lapsed
US
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Selective adsorption process
Assignee: Union Carbide Corp
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Filing: 1968-12-30
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Granted: 1971-02-23
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Expires: 1988-12-30
Abstract
Abstract A PRESSURE SWING ADSORPTION PROCESS FOR SEPARATION OF GAS MIXTURES IN WHICH AT LEAST FOUR ADSORBENT BEDS ARE JOINED SO THAT THE ADSORBATE LOADED BED IS PRESSURE EQUALIZED WITH TWO OTHER BEDS IN STAGED SEQUENCE.
Inventors
- 👤 Louis Bela Batta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:03
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2253/30; B01D2253/302; B01D2253/304; B01D2256/00; B01D2256/12; B01D2256/16; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/30; B01D2257/304; B01D2257/40; B01D2257/406; B01D2257/50; B01D2257/502; B01D2257/504; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2257/7025; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40028; B01D2259/4003; B01D2259/40035; B01D2259/40041; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/40058; B01D2259/40071; B01D2259/40073; B01D2259/40077; B01D2259/40081; B01D2259/404; B01D2259/406; B01D2259/4061; B01D53/26; B01D53/261; Y; Y02; Y02C; Y02C20/00; Y02C20/20; Y02C20/40
Claims Analysis
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |