Patent US3480696A successfully refreshed from Google Patents.
US3480696A
Expired / Lapsed
US
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Alpha olefin block copolymers and their preparation
Assignee: Shell USA Inc
•
Filing: 1966-11-16
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Granted: 1969-11-25
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Howard L Hassell
- 👤 Roy G Hayter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:11
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3265765A
Cited
US3301921A
Cited
US3326883A
Cited
US3378606A
Cited
US3296338A
Cited
US3378608A
Cited
US3358056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |