US3458489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homopolymers of cyclopentene and processes for preparing the same
Assignee: Montedison SpA
•
Filing: 1964-01-22
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Granted: 1969-07-29
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Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Giulio Natta
- 👤 Gino Dall Asta
- 👤 Giorgio Mazzanti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:51
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3330815A
Cited
US3366616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |