US3385840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating copolymers of ethylene with cyclo-olefins
Assignee: Montedison SpA
•
Filing: 1966-08-22
•
Granted: 1968-05-28
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Dall Asta Gino
- 👤 Mazzanti Giorgio
- 👤 Pasquon Italo
- 👤 Valvassori Alberto
- 👤 Zambelli Adolfo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
C; C08; C08F; C08F210/00; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
NORMALLY SOLID COPOLYMERS OF ETHYLENE AND A CYCLOOLEFIN SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTENE AND CYCLOHEPTENE CONSISTING ESSENTIALLY OF LINEAR MACROMOLECULES SUBSTANTIALLY MADE UP OF A REGULAR 1:1 ALTERNATING SUCCESSION OF POLYMERIZED ETHYLENE UNITS AND POLYMERIZED UNITS OF THE SELECTED CYCLOOLEFIN IN WHICH LATTER UNITS THE TERTIARY CARBON ATOMS HAVE A REGULAR STERIC CONFIGURATION WHEREBY, THE COPOLYMERS EXHIBIT, ON X-RAY EXAMINATION AT ROOM TEMPERATURE, PRACTICALLY NO CRYSTALLINITY OF POLYETHYLENIC TYPE BUT DO EXHIBIT AT LEAST 50 PERCENT OF CRYSTALLINITY RESULTING FROM THE REGULARY ALTERNATING ARRANGEMENT OF THE POLYMERIZED ETHYLENE UNITS AND THE POLYMERIZED CYCLOOLEFIN UNITS IN WHICH THE TERTIARY CARBON ATOMS HAVE THE REGULAR STERIC CONFIGURATION, THE COPOLYMERS HAVING AN IDENTITY PERIOD OF 9.0$0.2 A. DETERMINED BY X-RAY EXAMINATION OF STRETCHED, ANNEALED FIBERS THEREOF.
Claim 2
Dependent Claim
125 words
NORMALLY SOLID COPOLYMERS OF ETHYLENE AND A CYCLOOLEFIN SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTENE AND CYCLOHEPTENE CONSISTING ESSENTIALLY OF LINEAR MACROMOLECULES SUBSTANTIALLY MADE UP OF A REGULAR 1:1 ALTERNATING SUCCESSION OF POLYMERIZED ETHYLENE UNITS AND POLYMERIZED UNITS OF THE SELECTED CYCLOOLEFIN IN WHICH LATTER UNITS THE TERTIARY CARBON ATOMS HAVE A REGULAR STERIC CONFIGURATION WHEREBY, THE COPOLYMERS EXHIBIT, ON X-RAY EXAMINATION AT ROOM TEMPERATURE, PRACTICALLY NO CRYSTALLINITY OF POLYETHYLENIC TYPE BUT DO EXHIBIT AT LEAST 50 PERCENT OF CRYSTALLINITY RESULTING FROM THE REGULARY ALTERNATING ARRANGEMENT OF THE POLYMERIZED ETHYLENE UNITS AND THE POLYMERIZED CYCLOOLEFIN UNITS IN WHICH THE TERTIARY CARBON ATOMS HAVE THE REGULAR STERIC CONFIGURATION, THE COPOLYMERS HAVING AN IDENTITY PERIOD OF 9.0$0.2 A. DETERMINED BY X-RAY EXAMINATION OF STRETCHED, ANNEALED FIBERS THEREOF.
References Cited (Backward Citations)
US3058963A
Cited
US2945845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |