US3773734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene and alpha-olefins copolymers and process for obtaining same
Assignee: SnamProgetti SpA
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Filing: 1970-11-06
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Granted: 1973-11-20
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Expires: 1990-11-06
Abstract
Abstract NOVEL HIGH MOLECULAR WEIGHT ETHYLENE AND A-OLEFIN COPOLYMERS ARE DISCLOSED WHICH ARE AMORPHOUS AT AN ETHYLENE MOLE CONTENT OF UP TO 85% AND ARE CRYSTALLIZABLE WHEN STRETCHED. THE INDUCTION OF STRETCH CRYSTALLINITY INCREASES WITH THE TENSILE STRESS AND MAKES THE COPOLYMERS PARTICULARLY USEFUL IN THE ELASTIC FIBERS FIELD.
Inventors
- 👤 S Cucinella
- 👤 A Mazzei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |