US3336217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate solids withdrawal method
Assignee: CITIES SCRVICE RES AND DEV COM
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Filing: 1965-07-15
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Granted: 1967-08-15
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Expires: 1985-07-15
Abstract
No abstract record available.
Inventors
- 👤 Edward P Meaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:00
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
151 words
METHOD FOR INTERMITTENTLY WITHDRAWING PARTICULATE SOLID MAINTAINED IN A BED IN CONTACT WITH A LIQUID WITHIN A HIGH PRESSURE VESSEL WHICH COMPRISES WITHDRAWING SAID PARTICULATE SOLID THROUGH AN ENCLOSED PASSAGE EXTENDING GENERALLY UPWARDLY FROM AN INLET WITHIN SAID BED OF PATICULATE SOLID, BENDING AND THEN EXTENDING GENERALLY DOWNWARDLY TO A POINT OUTSIDE VESSEL, THE RATION OF THE VOLUME OF THE SECTION OF SAID ENCLOSED PASSAGE FROM THE INLET WITHIN SAID BED TO THE APEX OF THE BEND TO THE TOTAL VOLUME OF THE PASSAGE BEING AT LEAST 0.1, TERMINATING THE FLOW OF PARTICULATE SOLID THROUGH SAID PASSAGE, INTRODUCING A PURGE FLUID INTO SAID PASSAGE AT A RELATIVELY HIGH VELOCITY TO CAUSE ANY LIQUID AND PARTICULATE SOLID ENTRAINED WITHIN SAID PASSAGE TO FLOW BACK INTO SAID VESSEL, AND THEREAFTER INTRODUCING A PURGE FLUID INTO SAID PASSAGE AT A RELATIVELY LOW VELOCITY TO MAINTAIN SAID PASSAGE SUBSTANTIALLY FREE OF LIQUID AND PARTICULATE SOLID.
Claim 2
Dependent Claim
151 words
METHOD FOR INTERMITTENTLY WITHDRAWING PARTICULATE SOLID MAINTAINED IN A BED IN CONTACT WITH A LIQUID WITHIN A HIGH PRESSURE VESSEL WHICH COMPRISES WITHDRAWING SAID PARTICULATE SOLID THROUGH AN ENCLOSED PASSAGE EXTENDING GENERALLY UPWARDLY FROM AN INLET WITHIN SAID BED OF PATICULATE SOLID, BENDING AND THEN EXTENDING GENERALLY DOWNWARDLY TO A POINT OUTSIDE VESSEL, THE RATION OF THE VOLUME OF THE SECTION OF SAID ENCLOSED PASSAGE FROM THE INLET WITHIN SAID BED TO THE APEX OF THE BEND TO THE TOTAL VOLUME OF THE PASSAGE BEING AT LEAST 0.1, TERMINATING THE FLOW OF PARTICULATE SOLID THROUGH SAID PASSAGE, INTRODUCING A PURGE FLUID INTO SAID PASSAGE AT A RELATIVELY HIGH VELOCITY TO CAUSE ANY LIQUID AND PARTICULATE SOLID ENTRAINED WITHIN SAID PASSAGE TO FLOW BACK INTO SAID VESSEL, AND THEREAFTER INTRODUCING A PURGE FLUID INTO SAID PASSAGE AT A RELATIVELY LOW VELOCITY TO MAINTAIN SAID PASSAGE SUBSTANTIALLY FREE OF LIQUID AND PARTICULATE SOLID.
Claim 3
Dependent Claim
58 words
METHOD AS IN CLAIM 1 WHEREIN SAID PARTICULATE SOLID IS HYDROGENATION CATALYST AND IS MAINTAINED IN A BED IN CONTACT WITH HEAVY HYDROCARBON OIL IN A HYDROGENATION ZONE MAINTAINED AT A PRESSURE OF FROM ABOUT 1,000 TO ABOUT 5,000 P.S.I.G. AND AT A TEMPERATURE OF FROM ABOUT 400* TO ABOUT 4500*F., AND SAID PURGE FLUID IS GASEOUS HYDROGEN.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |