US2918457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of propylene and butene-1
Assignee: Sunoco Inc
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Filing: 1957-09-26
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Granted: 1959-12-22
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Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 James L Jezl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:13
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR PREPARING SOLID COPOLYMERS OF PROPYLENE AND BUTENE-1 HAVING A BRITTLE POINT BELOW 0*C. AND A MOLECULAR WEIGHT IN EXCESS OF 60,000, WHICH COMPRISES CONTACTING, UNDER POLYMERIZING CONDITIONS, A POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF DI- AND TRICHLORIDES OF TITANIUM AND DI- AND TRICHLORIDES OF ZIRCONIUM, AND AN ACTIVATOR THEREFOR SELECTED FROM THE GROUP CONSISTING OF METAL ALKYLS, METAL ALKYL HALIDES, AND METAL HYDRIDES, WITH A MIXTURE OF PROPYLENE AND BUTENE-1 WHICH CONTAINS FROM 7% TO 25% BUTENE-1, THE REMAINDER OF SAID MIXTURE BEING PROPYLENE, WHEREBY POLYMERIZATION RESULTS, AND RECOVERING A SOLID COPOLYMER HAVING A BRITTLE POINT BELOW 0*C. AND MOLECULAR WEIGHT IN EXCESS OF 60,000.
Claim 2
Dependent Claim
110 words
A PROCESS FOR PREPARING SOLID COPOLYMERS OF PROPYLENE AND BUTENE-1 HAVING A BRITTLE POINT BELOW 0*C. AND A MOLECULAR WEIGHT IN EXCESS OF 60,000, WHICH COMPRISES CONTACTING, UNDER POLYMERIZING CONDITIONS, A POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF DI- AND TRICHLORIDES OF TITANIUM AND DI- AND TRICHLORIDES OF ZIRCONIUM, AND AN ACTIVATOR THEREFOR SELECTED FROM THE GROUP CONSISTING OF METAL ALKYLS, METAL ALKYL HALIDES, AND METAL HYDRIDES, WITH A MIXTURE OF PROPYLENE AND BUTENE-1 WHICH CONTAINS FROM 7% TO 25% BUTENE-1, THE REMAINDER OF SAID MIXTURE BEING PROPYLENE, WHEREBY POLYMERIZATION RESULTS, AND RECOVERING A SOLID COPOLYMER HAVING A BRITTLE POINT BELOW 0*C. AND MOLECULAR WEIGHT IN EXCESS OF 60,000.
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |