Patent US2972608A successfully refreshed from Google Patents.
US2972608A
Expired / Lapsed
US
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Process and two-component transition metal dihalide catalyst for polymerizing olefins
Assignee: Eastman Kodak Co
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Filing: 1958-06-19
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Granted: 1961-02-21
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Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Jr George O Cash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:22
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
IN THE POLYMERIZATION OF AN A-MONOOLEFINIC HYDROCARBON CONTAINING 2 TO 10 CARBON ATOMS, THE IMPROVEMENT IN FORMING HIGHLY CRYSTALLINE POLYMER WHICH COMPRISES EFFECTING THE POLYMERIZATION IN THE PRESENCE OF A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF A TITANIUM DIHALIDE, THE HALOGEN BEING SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE AND AN ETHER COMPOUND HAVING THE FORMULA RX WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL RADICALS CONTAINING 1 TO 4 CARBON ATOMS AND PHENYL AND X IS LOWER ALKOXY RADICAL CONTAINING 1 TO 4 CARBON ATOMS, THE MOLAR RATIO OF TITANIUM DIHALIDE TO RX COMPOUND BEING FROM 1:2 TO 10:1.
References Cited (Backward Citations)
FR1134740A
Cited
FR1135808A
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GB777538A
Cited
GB778639A
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GB790399A
Cited
FR1153323A
Cited
US2840551A
Cited
US2843577A
Cited
US2827447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |