US3036987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of crystallizable polypropylene having isotactic structure with an amorphous copolymer of ethylene and propylene and method for making same
Assignee: Montedison SpA
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Filing: 1958-07-09
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Granted: 1962-05-29
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Expires: 1978-07-09
Abstract
No abstract record available.
Inventors
- 👤 Ranalli Franco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:24
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A BLEND CONSISTING ESSENTIALLY OF (1) POLYPROPYLENE MADE UP FOR AT LEAST 55% OF CRYSTALLIZABLE ISOTATIC MACROMOLECULES WITH (2) FROM 5% TO 20% ON THE WEIGHT OF THE BLEND OF A LINEAR, AMORPHOUS COPOLYMER OF ETHYLENE AND PROPYLENE CONTAINING FROM 30% TO 70% OF ETHYLENE BY WEIGHT IN THE COPOLYMER MACROMOLECULE, THE BLEND HAVING A BRITTLE POINT WHICH IS SUBSTANTIALLY LOWER THAN THE BRITTLE POINT OF THE POLYPROPYLENE COMPONENT OF THE BLEND.
Claim 2
Dependent Claim
72 words
A BLEND CONSISTING ESSENTIALLY OF (1) POLYPROPYLENE MADE UP FOR AT LEAST 55% OF CRYSTALLIZABLE ISOTATIC MACROMOLECULES WITH (2) FROM 5% TO 20% ON THE WEIGHT OF THE BLEND OF A LINEAR, AMORPHOUS COPOLYMER OF ETHYLENE AND PROPYLENE CONTAINING FROM 30% TO 70% OF ETHYLENE BY WEIGHT IN THE COPOLYMER MACROMOLECULE, THE BLEND HAVING A BRITTLE POINT WHICH IS SUBSTANTIALLY LOWER THAN THE BRITTLE POINT OF THE POLYPROPYLENE COMPONENT OF THE BLEND.
References Cited (Backward Citations)
US2692258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |