Patent US3018263A successfully refreshed from Google Patents.
US3018263A
Expired / Lapsed
US
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Process for the manufacture of low brittle point polypropylene compositions
Assignee: Sunoco Inc
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Filing: 1957-11-14
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Granted: 1962-01-23
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Expires: 1977-11-14
Abstract
No abstract record available.
Inventors
- 👤 Schneider Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:29
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2207/00; C08L2207/10; C08L2207/14; C08L23/04; C08L23/06; C08L23/18; C08L23/20; C08L9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PREPARING POLYPROPYLENE COMPOSITIONS HAVING A BRITTLE POINT OF NOT MORE THAN ABOUT -5* C. WHICH COMPRISES MELTING TOGETHER, AT A TEMPERATURE UP TO 30* C. ABOVE THE MELTING POINT OF THE HIGHER MELTING MATERIAL, CRYSTALLINE POLYPROPYLENE AND FROM 5% TO 25% BY WEIGHT OF A DIFFERENT POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF ALIPHATIC OLEFINS HAVING FROM 4 TO 8 CARBON ATOMS, POLYSTYRENE, POLYETHYLENE, AND AMORPHOUS POLYPROPYLENE, MECHANICALLY WORKING THE MOLTEN POLYMER MIXTURE WHEREBY A SUBSTANTIALLY HOMOGENEOUS BLEND IS OBTAINED, AND SHOCK COOLING THE BLEND TO A TEMPERATURE OF NOT GREATER THAN 100* C. IN A TIME NOT EXCEEDING 10 MINUTES, WHEREBY THE HOMOGENEITY OF THE BLEND IS PRESERVED.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PREPARING POLYPROPYLENE COMPOSITIONS HAVING A BRITTLE POINT OF NOT MORE THAN ABOUT -5* C. WHICH COMPRISES MELTING TOGETHER, AT A TEMPERATURE UP TO 30* C. ABOVE THE MELTING POINT OF THE HIGHER MELTING MATERIAL, CRYSTALLINE POLYPROPYLENE AND FROM 5% TO 25% BY WEIGHT OF A DIFFERENT POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF ALIPHATIC OLEFINS HAVING FROM 4 TO 8 CARBON ATOMS, POLYSTYRENE, POLYETHYLENE, AND AMORPHOUS POLYPROPYLENE, MECHANICALLY WORKING THE MOLTEN POLYMER MIXTURE WHEREBY A SUBSTANTIALLY HOMOGENEOUS BLEND IS OBTAINED, AND SHOCK COOLING THE BLEND TO A TEMPERATURE OF NOT GREATER THAN 100* C. IN A TIME NOT EXCEEDING 10 MINUTES, WHEREBY THE HOMOGENEITY OF THE BLEND IS PRESERVED.
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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |