US3356765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isotactic polypropylene sheets containing isotactic poly-1-butene
Assignee: Montedison SpA
•
Filing: 1963-09-20
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Granted: 1967-12-05
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Musso Pompilio
- 👤 Guzzetta Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:35
CPC Classifications
B; B29; B29C; B29C59/00; C; C08; C08F; C08F10/00; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L53/00; C08L23/04; C08L23/06; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A THERMOPLASTIC SHEET PREPARED FROM A BLEND OF (1) POLYPROPYLENE COMPRISING AT LEAST 75% OF LINEAR, REGULAR HEAD-TO-TAIL ISOTACTIC-CRYSTALLINE MACROMOLECULES AND (2) ABOUT 5% TO 40% BY WEIGHT OF POLY-1-BUTENE COMPRISING AT LEAST 75% OF LINEAR, REGULAR HEAD-TO-TAIL ISOTACTIC-CRYSTALLINE MACROMOLECULES, SAID SHEET BEING THERMO-RESISTANT TO TEMPERATURES RANGING UP TO ABOUT 100*C., AND HAVING A HIGH MECHANICAL STRENGTH AND AN ELASTIC MODULUS RANGING FROM ABOUT 7,000 TO 15,000 KG./CM.2.
Claim 2
Dependent Claim
68 words
A THERMOPLASTIC SHEET PREPARED FROM A BLEND OF (1) POLYPROPYLENE COMPRISING AT LEAST 75% OF LINEAR, REGULAR HEAD-TO-TAIL ISOTACTIC-CRYSTALLINE MACROMOLECULES AND (2) ABOUT 5% TO 40% BY WEIGHT OF POLY-1-BUTENE COMPRISING AT LEAST 75% OF LINEAR, REGULAR HEAD-TO-TAIL ISOTACTIC-CRYSTALLINE MACROMOLECULES, SAID SHEET BEING THERMO-RESISTANT TO TEMPERATURES RANGING UP TO ABOUT 100*C., AND HAVING A HIGH MECHANICAL STRENGTH AND AN ELASTIC MODULUS RANGING FROM ABOUT 7,000 TO 15,000 KG./CM.2.
References Cited (Backward Citations)
BE538782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |