Patent US2899474A successfully refreshed from Google Patents.
US2899474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed pretreat in hydrocarbon adsorption process
Assignee: —
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Filing: —
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Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:11
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS FOR THE SEPARATION OF HYDROCARBONS OF A SELECTED TYPE FROM MIXTURES THEROF WITH HYDROCARBONS OF OTHER TYPES WHEREIN SAID MIXTURES ARE CONTACTED WITH A ZEOLITIC MOLECULAR SIEVE ADSORBENT OF A SELECTED PORE SIZE IN AN ADSORPTION ZONE AND ADSORBED HYDROCARBONS ARE PERIODICALLY DESORBED FROM SAID ADSORBENT IN A CYCLIC MANNER, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURES WITH A ZEOLITIC MOLECULAR SIEVE ADSORBENT OF THE SAME PORE SIZE AS THE ADSORBENT IN SAID ADSORPTION ZONE, IN A PRETREATMENT ZONE PRIOR TO SAID ADSORPTION ZONE, THE TEMPERATURE IN SAID PRETREATMENT ZONE BEING CONSIDERABLY BELOW THE TEMPERATURE IN SAID ADSORPTION ZONE.
Claim 2
Dependent Claim
102 words
IN A PROCESS FOR THE SEPARATION OF HYDROCARBONS OF A SELECTED TYPE FROM MIXTURES THEROF WITH HYDROCARBONS OF OTHER TYPES WHEREIN SAID MIXTURES ARE CONTACTED WITH A ZEOLITIC MOLECULAR SIEVE ADSORBENT OF A SELECTED PORE SIZE IN AN ADSORPTION ZONE AND ADSORBED HYDROCARBONS ARE PERIODICALLY DESORBED FROM SAID ADSORBENT IN A CYCLIC MANNER, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURES WITH A ZEOLITIC MOLECULAR SIEVE ADSORBENT OF THE SAME PORE SIZE AS THE ADSORBENT IN SAID ADSORPTION ZONE, IN A PRETREATMENT ZONE PRIOR TO SAID ADSORPTION ZONE, THE TEMPERATURE IN SAID PRETREATMENT ZONE BEING CONSIDERABLY BELOW THE TEMPERATURE IN SAID ADSORPTION ZONE.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |