US3471461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the polymerization of conjugated diolefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1964-11-02
•
Granted: 1969-10-07
•
Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Erik Tornqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:45
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2962490A
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US3281402A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |