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US3149080A
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US
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Bis (arene) chromium-aluminum alkyl polymerization catalysts
Assignee: Monsanto Co
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Filing: 1958-03-03
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Granted: 1964-09-15
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Earl W Gluesenkamp
- 👤 Jr William R Richard
- 👤 John F K Wilshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:50
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S264/00; Y10S264/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A CATALYST CONSISITING ESSENTAILLY OF BIS(ARENE)CHROMIUM AND AN ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OFTRIALKYL ALUMINUMS AND DIALKYL ALUMINUMHYDRIDES IN WHICH THE MOLE RATIO OF AL/CR IS FROM 0.5 TO 5 AND THE ARENA GROUP IS A MONOCYCLIC AROMATIC HYDROCARBON COMPOUND.
Claim 2
Dependent Claim
42 words
A CATALYST CONSISITING ESSENTAILLY OF BIS(ARENE)CHROMIUM AND AN ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OFTRIALKYL ALUMINUMS AND DIALKYL ALUMINUMHYDRIDES IN WHICH THE MOLE RATIO OF AL/CR IS FROM 0.5 TO 5 AND THE ARENA GROUP IS A MONOCYCLIC AROMATIC HYDROCARBON COMPOUND.
References Cited (Backward Citations)
US2619458A
Cited
US2736700A
Cited
US2822357A
Cited
US2786035A
Cited
US2827446A
Cited
US2843577A
Cited
US2824145A
Cited
US2952670A
Cited
US2939845A
Cited
US3033878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |