US3218266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalysts
Assignee: EIDP Inc
•
Filing: 1964-08-17
•
Granted: 1965-11-16
•
Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Ludlum David Blodgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A POLYMERIZATION CATALYST PREPARED BY INTRODUCING AN ALUMINUM TRIALKYL INTO A SOLUTION OF TICL4 AND A VANADIUM CHLORIDE SELECTED FROM THE GROUP CONSISTING OF VCL4 AND VOCL3 IN AN INERT LIQUID HYDROCARBON MEDIUM.
Claim 2
Dependent Claim
33 words
A POLYMERIZATION CATALYST PREPARED BY INTRODUCING AN ALUMINUM TRIALKYL INTO A SOLUTION OF TICL4 AND A VANADIUM CHLORIDE SELECTED FROM THE GROUP CONSISTING OF VCL4 AND VOCL3 IN AN INERT LIQUID HYDROCARBON MEDIUM.
References Cited (Backward Citations)
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US2440498A
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Cited
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US2721189A
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |