US3825490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular sieve selective adsorption process
Assignee: Texaco Inc
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Filing: 1972-02-14
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Granted: 1974-07-23
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Expires: 1992-02-14
Abstract
Abstract A MOLECULAR SIEVE SELECTIVE ADSORPTION PROCESS FOR SEPARATING NON-STRAIGHT CHAIN HYDROCARBONS FROM A C5-C9 CHARGE MIXTURE OF STRAIGHT CHAIN AND NON-STRAIGHT CHAIN HYDROCARBONS INCORPORATING A CHARGE VAPORIZATION SYSTEM WHEREIN LIQUID CHARGE IS PARTIALLY VAPORIZED IN A FIRST HEATING ZONE AT AN ELEVATED PRESSURE, WHEREIN PARTIALLY VAPOR- IZED CHARGE IS TOTALLY VAPORIZED BY ADIABATIC EXPANSION IN AN EXPANSION ZONE EXTERIOR TO THE HEATING ZONE, AND WHEREIN THE VAPORIZED CHARGE IS SUPERHEATED IN A SECOND HEATING ZONE PRIOR TO ADMISSION INTO AN ADSORPTION ZONE.
Inventors
- 👤 G Vachuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C10G25/12; B01D2256/00; B01D2256/24; B01D2259/00; B01D2259/40; B01D2259/403
Claims Analysis
Total Claims: 0
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |