US2946777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of polyolefins from liquid media
Assignee: Sunoco Inc
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Filing: 1957-06-21
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Granted: 1960-07-26
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Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Mertes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
PROCESS FOR SEPARATING SOLID POLYOLEFINS FROM LIQUID MEDIA WHICH COMPRISES CONTINUOUSLY INTRODUCING TO THE INTERIOR OF ROTATING CENTRIFUGE BOWL A SLURRY OF PARTICULATE SOLID POLYOLEFIN IN A LIQUID WHICH IS SUBSTANTIALLY INSOLUBLE IN MELTED POLYOLEFIN, WHICH HAS A BOILING POINT LOWER THAN THE MELTING POINT OF THE POLYOLEFIN AT THE PRESSURE GENERATED WITHIN THE CENTRIFUGE, AND WHICH HAS A DENSITY LOWER THAN THE SOLID POLYOLEFIN, MAINTAINING THE WALL OF THE CENTRIFUGE BOWL AT A TEMPERATURE HIGHER THAN THE MELTING POINT OF THE POLYOLEFIN WHEREBY TO MAINTAIN A LAYER OF MELTED POLYOLEFIN ADJACENT THE WALL OF THE CENTRIFUGE BOWL, CONTINUOUSLY REMOVING LIQUID FROM A POINT ADJACENT THE HUB OF THE CENTRIFUGE BOWL, AND CONTINUOUSLY RECOVERING MELTED POLYOLEFIN ESSENTIALLY FREE FROM NORMALLY LIQUID CONTAMINANTS FROM A POINT ADJACENT THE WALL OF THE CENTRIFUGE BOWL.
Claim 2
Dependent Claim
132 words
PROCESS FOR SEPARATING SOLID POLYOLEFINS FROM LIQUID MEDIA WHICH COMPRISES CONTINUOUSLY INTRODUCING TO THE INTERIOR OF ROTATING CENTRIFUGE BOWL A SLURRY OF PARTICULATE SOLID POLYOLEFIN IN A LIQUID WHICH IS SUBSTANTIALLY INSOLUBLE IN MELTED POLYOLEFIN, WHICH HAS A BOILING POINT LOWER THAN THE MELTING POINT OF THE POLYOLEFIN AT THE PRESSURE GENERATED WITHIN THE CENTRIFUGE, AND WHICH HAS A DENSITY LOWER THAN THE SOLID POLYOLEFIN, MAINTAINING THE WALL OF THE CENTRIFUGE BOWL AT A TEMPERATURE HIGHER THAN THE MELTING POINT OF THE POLYOLEFIN WHEREBY TO MAINTAIN A LAYER OF MELTED POLYOLEFIN ADJACENT THE WALL OF THE CENTRIFUGE BOWL, CONTINUOUSLY REMOVING LIQUID FROM A POINT ADJACENT THE HUB OF THE CENTRIFUGE BOWL, AND CONTINUOUSLY RECOVERING MELTED POLYOLEFIN ESSENTIALLY FREE FROM NORMALLY LIQUID CONTAMINANTS FROM A POINT ADJACENT THE WALL OF THE CENTRIFUGE BOWL.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |