Patent US5082103A successfully refreshed from Google Patents.
US3240532A
Expired / Lapsed
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Method and apparatus for transferring finely divided solids
Assignee: United States Steel Corp
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Filing: 1963-10-10
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Granted: 1966-03-15
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Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter D Ahner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:29
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0037; C21B; C21B5/00; C21B5/001; C21B5/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A PROCESS IN WHICH FINELY DIVIDED SOLIDS ARE CONTAINED IN A CLOSED VESSEL AND TRANSFERRED PENUMATICALLY THEREFROM TO A DELIVERY POINT WHERE THE PRESSURE IS LOWER THAN THAT IN SAID VESSEL BUT SUBJECT TO VARIATIONS, THE COMBINATION THEREWITH OF A METHOD OF CONTROLLING THE RATE AT WHICH THE SOLIDS ARE TRANSFERRED COMPRISING INTRODUCING AIR AT A CONSTANT RATE FROM A PRIMARY SUPPLY TO SAID VESSEL TO PRESSUIRZE IT AND FORCE SOLIDS TO DISCHARGE THEREFROM CONTINUOUSLY INTRODUCING AIR FROM A SECONDARY SUPPLY TO SOLIDS DISCHARGING FROM SID VESSEL TO CONVEY THE SOLIDS TO SAID DELIVERY POINT, CONTINUOUSLY BLEEDING AIR FROM SAID VESSEL, THE PRESSURE WITHIN SAID VESSLE BEING A FUNCTION OF THE RATE AT WHICH AIR ESCAPES THEREFROM, MEASURING PRESSURES REPRESENTATIVE OF THOS IN SAID VESSEL AND AT SAID DELIVERY POINT, AND ADJUSTING THE RATE AT WHICH AIR ESCPAES IN ACCORDANCE WITH VARIATIONS IN PRESSURE AT SAID DELIVERY POINT TO MAINTAIN THE PRESSURE IN SAID VESSEL AT A VALUE SUCH THAT THE PRESSURE DROP BETWEEN SAID VESSEL AND SAID DELIVERY POINT IS SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
174 words
IN A PROCESS IN WHICH FINELY DIVIDED SOLIDS ARE CONTAINED IN A CLOSED VESSEL AND TRANSFERRED PENUMATICALLY THEREFROM TO A DELIVERY POINT WHERE THE PRESSURE IS LOWER THAN THAT IN SAID VESSEL BUT SUBJECT TO VARIATIONS, THE COMBINATION THEREWITH OF A METHOD OF CONTROLLING THE RATE AT WHICH THE SOLIDS ARE TRANSFERRED COMPRISING INTRODUCING AIR AT A CONSTANT RATE FROM A PRIMARY SUPPLY TO SAID VESSEL TO PRESSUIRZE IT AND FORCE SOLIDS TO DISCHARGE THEREFROM CONTINUOUSLY INTRODUCING AIR FROM A SECONDARY SUPPLY TO SOLIDS DISCHARGING FROM SID VESSEL TO CONVEY THE SOLIDS TO SAID DELIVERY POINT, CONTINUOUSLY BLEEDING AIR FROM SAID VESSEL, THE PRESSURE WITHIN SAID VESSLE BEING A FUNCTION OF THE RATE AT WHICH AIR ESCAPES THEREFROM, MEASURING PRESSURES REPRESENTATIVE OF THOS IN SAID VESSEL AND AT SAID DELIVERY POINT, AND ADJUSTING THE RATE AT WHICH AIR ESCPAES IN ACCORDANCE WITH VARIATIONS IN PRESSURE AT SAID DELIVERY POINT TO MAINTAIN THE PRESSURE IN SAID VESSEL AT A VALUE SUCH THAT THE PRESSURE DROP BETWEEN SAID VESSEL AND SAID DELIVERY POINT IS SUBSTANTIALLY CONSTANT.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |