Patent US3172737A successfully refreshed from Google Patents.
US3172737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant
Assignee: —
•
Filing: —
•
Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:26
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; B01J19/24; B01J19/2415; B01J19/2435; B01J3/00; B01J3/02; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/48; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
APPARATUS COMPRISING, IN COMBINATION: A TUBULAR CLOSED REACTOR WITH SMOOTH BENDS, SAID REACTOR BEING SUBSTANTIALLY FREE FROM INTERNAL OBSTRUCTIONS; MEANS FOR INTRODUCING OLEFIN REACTANT, POLYMERIZATION CATALYST, AND LIQUID HYDROCARBON DILUENT INTO SAID REACTOR; MEANS FOR CONTINUOUSLY MOVING THE CONTENTS OF SAID REACTOR THERETHROUGH; AN UPRIGHT APPENDAGE ATTACHED TO AND IN DIRECT OPEN COMMUNICATION WITH THE INTERIOR OF THE LOWER PORTION OF SAID REACTOR DISPOSED TO RECEIVE SOLIDS FROM SAID REACTOR; MEANS FOR COOLING THE INTERIOR OF SAID APPENDAGE; A HOUSING IN DIRECT OPEN COMMUNICATION WITH THE INTERIOR OF THE LOWER PORTION OF SAID APPENDAGE; A TAPERED SHAFT WITH WORM POSITIONED WITHIN SAID HOUSING AND EXTENDING INTO THE LOWER PORTION OF SAID APPENDAGE, THE ANNULAR CLEARANCE BETWEEN SAID SHAFT AND THE INTERIOR WALL OF SAID HOUSING GRADUALLY DECREASING TOWARD THE DISCHARGE TERMINUS OF SAID HOUSING; SAID HOUSING HAVING A CHOKE SECTION OF REDUCED CROSS-SECTIONAL AREA NEAR SAID LOWER TERMINUS, SAID CHOKE SECTION BEING FREE OF WORM ON SAID TAPERED SHAFT; A REMOVAL WORM SECTION ON A CONTINUATION OF SAID SHAFT HAVING INCREASED CLEARANCE BETWEEN SAID SHAFT AND SAID INTERIOR HOUSING WALL DOWNSTREAM OF SAID CHOKE SECTION FOR REMOVING SOLIDS FROM SAID CHOKE SECTION; MEANS FOR ROTATING SAID CONVEYING MEANS; MEANS FOR WITHDRAWING SOLIDS FROM SAID REMOVAL SECTION.
Claim 2
Dependent Claim
206 words
APPARATUS COMPRISING, IN COMBINATION: A TUBULAR CLOSED REACTOR WITH SMOOTH BENDS, SAID REACTOR BEING SUBSTANTIALLY FREE FROM INTERNAL OBSTRUCTIONS; MEANS FOR INTRODUCING OLEFIN REACTANT, POLYMERIZATION CATALYST, AND LIQUID HYDROCARBON DILUENT INTO SAID REACTOR; MEANS FOR CONTINUOUSLY MOVING THE CONTENTS OF SAID REACTOR THERETHROUGH; AN UPRIGHT APPENDAGE ATTACHED TO AND IN DIRECT OPEN COMMUNICATION WITH THE INTERIOR OF THE LOWER PORTION OF SAID REACTOR DISPOSED TO RECEIVE SOLIDS FROM SAID REACTOR; MEANS FOR COOLING THE INTERIOR OF SAID APPENDAGE; A HOUSING IN DIRECT OPEN COMMUNICATION WITH THE INTERIOR OF THE LOWER PORTION OF SAID APPENDAGE; A TAPERED SHAFT WITH WORM POSITIONED WITHIN SAID HOUSING AND EXTENDING INTO THE LOWER PORTION OF SAID APPENDAGE, THE ANNULAR CLEARANCE BETWEEN SAID SHAFT AND THE INTERIOR WALL OF SAID HOUSING GRADUALLY DECREASING TOWARD THE DISCHARGE TERMINUS OF SAID HOUSING; SAID HOUSING HAVING A CHOKE SECTION OF REDUCED CROSS-SECTIONAL AREA NEAR SAID LOWER TERMINUS, SAID CHOKE SECTION BEING FREE OF WORM ON SAID TAPERED SHAFT; A REMOVAL WORM SECTION ON A CONTINUATION OF SAID SHAFT HAVING INCREASED CLEARANCE BETWEEN SAID SHAFT AND SAID INTERIOR HOUSING WALL DOWNSTREAM OF SAID CHOKE SECTION FOR REMOVING SOLIDS FROM SAID CHOKE SECTION; MEANS FOR ROTATING SAID CONVEYING MEANS; MEANS FOR WITHDRAWING SOLIDS FROM SAID REMOVAL SECTION.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |