US3663638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic hydrocarbon separation by adsorption
Assignee: Universal Oil Products Co
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Filing: 1970-08-31
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Granted: 1972-05-16
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Expires: 1990-08-31
Abstract
Abstract A PROCESS FOR THE SEPARATION OF A C8 AROMATIC COMPONENT FROM A FEED MIXTURE CONTAINING AT LEAST TWO C8 AROMATIC HYDROCARBONS USING A CRYSTALLINE ALUMINOSILICATE ADSORBENT CONTAINING BARIUM AND POTASSIUM CATIONS. A FEED MIXTURE IS CONTACTED WITH AN ADSORBENT WHEREIN ONE COMPONENT OF THE FEED IS PREFERENTIALLY ADSORBED BY THE ADSORBENT. THE PREDERENTIALLY ADSORBED COMPONENT OF THE FEED IS THEREAFTER RECOVERED UTILIZING A DESORPTION STEP.
Inventors
- 👤 Richard W Neuzil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:04
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |