Patent US2717694A successfully refreshed from Google Patents.
US2717694A
Expired / Lapsed
US
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Elutriation of fines from powdered solids having agglomerating tendencies
Assignee: Standard Oil Co
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Filing: 1954-05-26
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Granted: 1955-09-13
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Expires: 1974-05-26
Abstract
No abstract record available.
Inventors
- 👤 William F Pansing
- 👤 Ries Alvin William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
B; B03; B03B; B03B4/00; B03B4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF ELUTRIATING FINES FROM A FLUIDIZED MASS OF POWDERED SOLIDS WHICH HAVE A TENDENCY TOWARD AGGLOMERATION, WHICH METHOD COMPRISES INTRODUCING A PORTION OF THE ELUTRIATING GAS AT THE BASE OF SAID FLUIDIZED MASS IN AN AMOUNT SUFFICIENT TO MAINTAIN SAID MASS IN FLUIDIZED CONDITION, TO PROVIDE A SUPERFICIAL UPWARD GAS VELOCITY IN SAID MASS SUBSTANTIALLY EQUIVALENT TO THE SETTLING VELOCITY OF THE LARGEST PARTICLES TO BE REMOVED, AND TO PROVIDE A DENSE PHASE INTERFACE AND INJECTING ANOTHER PORTION OF THE ELUTRIATING GAS AT AT LEAST ONE POINT ADJACENT SAID INTERFACE AT A VELOCITY SUFFICIENT TO BREAK UP AGGLOMERATES BUT INSUFFICIENT TO EFFECT APPRECIABLE ATTRITION.
Claim 2
Independent Claim
106 words
THE METHOD OF ELUTRIATING FINES FROM A FLUIDIZED MASS OF POWDERED SOLIDS WHICH HAVE A TENDENCY TOWARD AGGLOMERATION, WHICH METHOD COMPRISES INTRODUCING A PORTION OF THE ELUTRIATING GAS AT THE BASE OF SAID FLUIDIZED MASS IN AN AMOUNT SUFFICIENT TO MAINTAIN SAID MASS IN FLUIDIZED CONDITION, TO PROVIDE A SUPERFICIAL UPWARD GAS VELOCITY IN SAID MASS SUBSTANTIALLY EQUIVALENT TO THE SETTLING VELOCITY OF THE LARGEST PARTICLES TO BE REMOVED, AND TO PROVIDE A DENSE PHASE INTERFACE AND INJECTING ANOTHER PORTION OF THE ELUTRIATING GAS AT AT LEAST ONE POINT ADJACENT SAID INTERFACE AT A VELOCITY SUFFICIENT TO BREAK UP AGGLOMERATES BUT INSUFFICIENT TO EFFECT APPRECIABLE ATTRITION.
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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |