US3081289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization apparatus and method
Assignee: Shell USA Inc
•
Filing: 1959-04-27
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Granted: 1963-03-12
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Expires: 1979-04-27
Abstract
No abstract record available.
Inventors
- 👤 Harry A Cheney
- 👤 Jr Charles A Sleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:20
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/04; C08F110/06; Y; Y10; Y10S; Y10S526/00; Y10S526/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD FOR CARRYING OUT A POLYMERIZATION REACTION WHICH RESULTS IN A SLURRY OF SMALL SOLID PARTICLES IN A LIQUID OF RELATIVELY LOW DENSITY, WHICH COMPRISES ESTABLISHING IN A SINGLE REACTOR A VAPOR ZONE ABOVE A LIQUID ZONE WHICH IS PARTITIONED INTO AT LEAST TWO SUBSTANTIALLY SEPARATE COMPARTMENTS WHICH ARE IN LIQUID COMMUNICATION WITH EACH OTHER BOTH ABOVE AND BELOW SAID PARTITION, MAINTAINING A CATALYST-CONTAINING REACTION MIXTURE SLURRY IN SAID LIQUID ZONE, INTRODUCING A SUBSTANTIAL DISPERSED STREAM OF GAS INTO AT LEAST ONE, BUT LESS THAN ALL, OF SAID COMPARTMENTS WHEREBY THE SLURRY CONTENT OF EACH COMPARTMENT INTO WHICH GAS IS FLOWING IS CAUSED TO RISE IN SAID COMPARTMENT, FLOW INTO ANOTHER COMPARTMENT OVER THE TOP OF SAID PARTITION, DESCENT IN SAID OTHER COMPARTMENT AND FLOW BACK INTO EACH OF SAID COMPARTMENTS INTO WHICH SAID SUBSTANTIAL DISPERSED STREAM OF GAS IS INTRODUCED, CONTINUOUSLY INTRODUCING GAS, WITHDRAWING GAS FROM SAID VAPOR ZONE, AND WITHDRAWING SLURRY FROM SAID LIQUID ZONE.
Claim 2
Independent Claim
158 words
A METHOD FOR CARRYING OUT A POLYMERIZATION REACTION WHICH RESULTS IN A SLURRY OF SMALL SOLID PARTICLES IN A LIQUID OF RELATIVELY LOW DENSITY, WHICH COMPRISES ESTABLISHING IN A SINGLE REACTOR A VAPOR ZONE ABOVE A LIQUID ZONE WHICH IS PARTITIONED INTO AT LEAST TWO SUBSTANTIALLY SEPARATE COMPARTMENTS WHICH ARE IN LIQUID COMMUNICATION WITH EACH OTHER BOTH ABOVE AND BELOW SAID PARTITION, MAINTAINING A CATALYST-CONTAINING REACTION MIXTURE SLURRY IN SAID LIQUID ZONE, INTRODUCING A SUBSTANTIAL DISPERSED STREAM OF GAS INTO AT LEAST ONE, BUT LESS THAN ALL, OF SAID COMPARTMENTS WHEREBY THE SLURRY CONTENT OF EACH COMPARTMENT INTO WHICH GAS IS FLOWING IS CAUSED TO RISE IN SAID COMPARTMENT, FLOW INTO ANOTHER COMPARTMENT OVER THE TOP OF SAID PARTITION, DESCENT IN SAID OTHER COMPARTMENT AND FLOW BACK INTO EACH OF SAID COMPARTMENTS INTO WHICH SAID SUBSTANTIAL DISPERSED STREAM OF GAS IS INTRODUCED, CONTINUOUSLY INTRODUCING GAS, WITHDRAWING GAS FROM SAID VAPOR ZONE, AND WITHDRAWING SLURRY FROM SAID LIQUID ZONE.
References Cited (Backward Citations)
US1601938A
Cited
US2444848A
Cited
US2636026A
Cited
US2720447A
Cited
US2746605A
Cited
US2846425A
Cited
US2885389A
Cited
US2854320A
Cited
US2903344A
Cited
US2878240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |