Patent US3380984A successfully refreshed from Google Patents.
US3380984A
Expired / Lapsed
US
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Alfin type catalysts, their production and use in polymerization
Assignee: Millennium Petrochemicals Inc
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Filing: 1963-11-01
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Granted: 1968-04-30
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 William R Birchall
- 👤 Edwin A Allgeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:10
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
AN ALFIN-TYPE CATALYST COMPRISING AN INTIMATE MIXTURE IN AN INERT DILUENT OF A DIALKALI METAL DIALLYLIC-TYPE HYDROCARBON COMPOUND, AN ALKALI METAL SALT OF A METHYLN-CARBINOL, AND A FINELY-DIVIVDED ALKALI METAL HALIDE.
Claim 2
Dependent Claim
31 words
AN ALFIN-TYPE CATALYST COMPRISING AN INTIMATE MIXTURE IN AN INERT DILUENT OF A DIALKALI METAL DIALLYLIC-TYPE HYDROCARBON COMPOUND, AN ALKALI METAL SALT OF A METHYLN-CARBINOL, AND A FINELY-DIVIVDED ALKALI METAL HALIDE.
References Cited (Backward Citations)
US3067187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |