US3444153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process and catalyst for olefins
Assignee: Phillips Petroleum Co
•
Filing: 1965-08-16
•
Granted: 1969-05-13
•
Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Fodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:48
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB846731A
Cited
US2922782A
Cited
US3342793A
Cited
US3225021A
Cited
US3326883A
Cited
US3251819A
Cited
US3317502A
Cited
US3328375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |