US2642153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation by adsorption and preferential desorption
Assignee: Eastman Kodak Co
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Filing: 1951-04-02
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Granted: 1953-06-16
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Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 William A Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0423; C; C07; C07C; C07C7/00; C07C7/12; B01D2253/00; B01D2253/10; B01D2253/106; B01D2256/00; B01D2256/24; B01D2257/00; B01D2257/70; B01D2257/702
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
METHOD FOR THE SEPARATION OF PROPYLENE FROM GASEOUS MIXTURES CONTAINING ABOUT 2-75% PROPYLENE, THE REMAINDER BEING SUBSTANTIALLY ALL PROPANE, SAID METHOD COMPRISING THE STEPS OF ADSORBING THE PROPYLENE AND PROPANE OF SAID MIXTURE ON SILICA GEL MAINTAINED AT A TEMPERATURE NOT EXCEEDING ABOUT 30*C., THEREAFTER LIBERATING AND WITHDRAWING FROM THE GEL SUBSTANTIALLY PURE PROPANE BY INCREASING THE TEMPERATURE OF THE GEL TO WITHIN THE RANGE OF ABOUT 35*C. TO 53*C., THEN LIBERATING AND WITHDRAW-
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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |