Patent US2667448A successfully refreshed from Google Patents.
US2667448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling finely divided solids
Assignee: Standard Oil Development Co
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Filing: 1950-03-30
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Granted: 1954-01-26
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Expires: 1970-03-30
Abstract
No abstract record available.
Inventors
- 👤 John C Munday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:41
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G53/18; B65G53/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
THE METHOID OF TRANSFERRING A FINELY DIVIDED FLUIDIZED SOLID CONTINUOUSLY FROM ONE OF TWO CONTACTING CHAMBERS CONTAINING SEPARATE GASEOUS ATMOSPHERES TO THE OTHER AND BACK AGAIN IN A CLOSED CYCLE, WHICH COMPRISES WITHDRAWING A DENSE COLUMN OF FLUIDIZED SOLID DOWNWARD FROM THE PORTION OF EACH OF SAID CONTACTING ZONES THROUGH AN UNRESTRICTED OPEN STANDPIPE IN WHICH THE FLUISTATIC PRESSURE OF THE COLUMN OF SOLID CREATES AT THE BOTTOM OF EACH OF SAID STANDPIPES A HIGH PRESSURE ZONE WHEREIN THE PRESSURE IS GREATER THAN THE PRESSURE AT THE BOTTOM OF EITHER OF SAID CONTACTING CHAMBERS, PASSING THE SOLID FROM EACH OF SAID HIGH PRSSURE ZONES UPWARD THROUGH AN EXTERNAL TRANSFE LINE COMMUNICATING THEREWITH AND LEADING TO THE BOTTOM PORTION OF THE OTHER CONTACTING CHAMBER, AND CONTROLLING THE CONCENTRATION OF SOLIDS IN SAID TRANSFER LINES TO REGULATE THE FLOW OF SOLIDS BETWEEN SAID CHAMBERS WHILE MAINTAINING THE TOTAL FLUISTATIC PRESSURE HEAD ON THE SOLID AT THE BOTTOM OF EACH STANDPIPE GREATER THAN THE TOTAL FLUISTATIC PRESSURE HEAD ON THE SOLID IN THE TRANSFER LINE COMMUNICATING THEREWITH, SAID HIGH PRESSURE ZONES BELOW THE LEVEL OF BOTH CONTACTING ZONES PROVDING A POSITIVE MEANS OF PREVENTING THE INADVERTENT BACK-MIXING OF THE ATMOSPHERE IN EITHER OF SAID CONTACTING ZONES INTO THE OTHER.
Claim 2
Dependent Claim
206 words
THE METHOID OF TRANSFERRING A FINELY DIVIDED FLUIDIZED SOLID CONTINUOUSLY FROM ONE OF TWO CONTACTING CHAMBERS CONTAINING SEPARATE GASEOUS ATMOSPHERES TO THE OTHER AND BACK AGAIN IN A CLOSED CYCLE, WHICH COMPRISES WITHDRAWING A DENSE COLUMN OF FLUIDIZED SOLID DOWNWARD FROM THE PORTION OF EACH OF SAID CONTACTING ZONES THROUGH AN UNRESTRICTED OPEN STANDPIPE IN WHICH THE FLUISTATIC PRESSURE OF THE COLUMN OF SOLID CREATES AT THE BOTTOM OF EACH OF SAID STANDPIPES A HIGH PRESSURE ZONE WHEREIN THE PRESSURE IS GREATER THAN THE PRESSURE AT THE BOTTOM OF EITHER OF SAID CONTACTING CHAMBERS, PASSING THE SOLID FROM EACH OF SAID HIGH PRSSURE ZONES UPWARD THROUGH AN EXTERNAL TRANSFE LINE COMMUNICATING THEREWITH AND LEADING TO THE BOTTOM PORTION OF THE OTHER CONTACTING CHAMBER, AND CONTROLLING THE CONCENTRATION OF SOLIDS IN SAID TRANSFER LINES TO REGULATE THE FLOW OF SOLIDS BETWEEN SAID CHAMBERS WHILE MAINTAINING THE TOTAL FLUISTATIC PRESSURE HEAD ON THE SOLID AT THE BOTTOM OF EACH STANDPIPE GREATER THAN THE TOTAL FLUISTATIC PRESSURE HEAD ON THE SOLID IN THE TRANSFER LINE COMMUNICATING THEREWITH, SAID HIGH PRESSURE ZONES BELOW THE LEVEL OF BOTH CONTACTING ZONES PROVDING A POSITIVE MEANS OF PREVENTING THE INADVERTENT BACK-MIXING OF THE ATMOSPHERE IN EITHER OF SAID CONTACTING ZONES INTO THE OTHER.
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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |