US2886419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for maintaining a dip leg seal in a fluidized catalytic reaction vessel
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-03-10
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Granted: 1959-05-12
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Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Franklin M Orr
- 👤 William K Roquemore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1854; B01J8/005; B01J8/0055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN A CATALYTIC CRACKING REACTION VESSEL HAVING AT LEAST ONE INLET AT ITS LOWEST END AND AT LEAST ONE OUTLET AT ITS UPPER END AND PROVIDED WITH AT LEAST ONE CYCLONE SEPARATOR HAVING A DIP LEG ADAPTED TO RETURN FINELY DIVIDED CATALYST SEPARATED FROM A DISPERSE PHASE IN SAID VESSEL TO A DENSE PHASE IN SAID VESSIL, THE COMBINATION WITH SAID VESSEL OF A CYLINDRICAL SLEEVE SURROUNDING THE LOWER END OF SAID DIP LEG HAVING A DIAMETER IN THE RANGE BETWEEN 1.5 AND 2.5 TIMES THE DIAMETER OF THE DIP LEG TO PROVIDE A QUIESCENT ZONE ON THE LOWER END OF SAID DIP LEG TO SEAL SAID DIP LEG, PERFORATED MEANS ATTACHED TO SAID VESSEL AND TO THE LOWER END OF SAID SLEEVE SUPPORTING SAID SLEEVE FREE OF SAID DIP LEG, SAID SLEEVE BEING PROVIDED WITH AT LEAST ONE OPENING ADJACENT ITS LOWER END FOR FLOW OF GASIFORM MATERIAL AND FLUID THERETHROUGH, SAID SLEEVE BEING CLOSED ON ITS LOWER END BY A SPLASH PLATE WHEREBY FINELY DIVIDED CATALYST RETURNED TO THE DENSE PHASE BY SAID DIP LEG IM-
Claim 2
Dependent Claim
178 words
IN A CATALYTIC CRACKING REACTION VESSEL HAVING AT LEAST ONE INLET AT ITS LOWEST END AND AT LEAST ONE OUTLET AT ITS UPPER END AND PROVIDED WITH AT LEAST ONE CYCLONE SEPARATOR HAVING A DIP LEG ADAPTED TO RETURN FINELY DIVIDED CATALYST SEPARATED FROM A DISPERSE PHASE IN SAID VESSEL TO A DENSE PHASE IN SAID VESSIL, THE COMBINATION WITH SAID VESSEL OF A CYLINDRICAL SLEEVE SURROUNDING THE LOWER END OF SAID DIP LEG HAVING A DIAMETER IN THE RANGE BETWEEN 1.5 AND 2.5 TIMES THE DIAMETER OF THE DIP LEG TO PROVIDE A QUIESCENT ZONE ON THE LOWER END OF SAID DIP LEG TO SEAL SAID DIP LEG, PERFORATED MEANS ATTACHED TO SAID VESSEL AND TO THE LOWER END OF SAID SLEEVE SUPPORTING SAID SLEEVE FREE OF SAID DIP LEG, SAID SLEEVE BEING PROVIDED WITH AT LEAST ONE OPENING ADJACENT ITS LOWER END FOR FLOW OF GASIFORM MATERIAL AND FLUID THERETHROUGH, SAID SLEEVE BEING CLOSED ON ITS LOWER END BY A SPLASH PLATE WHEREBY FINELY DIVIDED CATALYST RETURNED TO THE DENSE PHASE BY SAID DIP LEG IM-
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |