Patent US3753896A successfully refreshed from Google Patents.
US3753896A
Expired / Lapsed
US
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N-paraffin adsorption with a 20 to 55% overcharge
Assignee: Texaco Trinidad Inc
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Filing: 1971-05-20
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Granted: 1973-08-21
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Expires: 1991-05-20
Abstract
Abstract A MULTI-STEP VAPOR PHASE HYDROCARBON SEPARATION PROCESS WHEREIN THE STRAIGHT CHAIN HYDROCARBON COMPONENTS OF A FEED MIXTURE CONTAINING SAID COMPONENTS AND NONSTRAIGHT CHAIN HYDROCARBON COMPONENTS IN AN ADSORPTION ZONE ARE ABSORBED ON A MOLECULAR SEIVE SELECTIVE ADSORBENT IN THE ADSORPTION STEP, AND THE STRAIGHT CHAIN COMPONENTS AND SUBSEQUENTLY REMOVED FROM THE SELECTIVE ABSORBANT IN A DESORPTION STEP TO THE EXTENT OF FROM ABOUT 73-90% BE WEIGHT OF THE ABSORBED STRAIGHT CHAIN HYDROCARBON COMPONENTS BY A DESORBING MEDIUM COMPRISING A LIGHTER STRAIGHT CHAIN HYDROCARBON OR A MIXTURE OF SAID LIGHTER STRAIGHT CHAIN HYDROCARBONS.
Inventors
- 👤 Verteuil G De
- 👤 W Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:21
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C10; C10G; C10G25/00; C10G25/02; C10G25/03
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |