US2996494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalysts containing alkali metal tetraphenylborate, aluminum chloride and transition element compounds
Assignee: Eastman Kodak Co
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Filing: 1958-11-06
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Granted: 1961-08-15
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Expires: 1978-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jr George O Cash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS FOR POLYMERIZING A NORMALLY GASEOUS A-MONOOLEFIN TO SOLID HIGH MOLECULAR WEIGHT, CRYSTALLINE POLYMER WHICH COMPRISES CONTACTING SAID A-MONOOLEFIN WITH A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF SODIUM TETRAPHENYLBORATE, ALUMINUM CHLORIDE AND A HALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM AND CHROMIUM AT A TEMPERATURE WITHIN THE RANGE OF -20*C. TO 300*C., THE WEIGHT RATIO OF SODIUM TETRAPHENYLBORATE TO ALUMINUM CHLORIDE IN SAID CATALYTIC MIXTURE BEING WITHIN THE RANGE OF 15:1 TO 1:1 AND THE WEIGHT RATIO OF ALUMINUM CHLORIDE TO TRANSITION METAL HALIDE IN SAID CATALYTIC MIXTURE BEING WITHIN THE RANGE OF 0.1:1 TO 3:1.
Claim 2
Dependent Claim
102 words
THE PROCESS FOR POLYMERIZING A NORMALLY GASEOUS A-MONOOLEFIN TO SOLID HIGH MOLECULAR WEIGHT, CRYSTALLINE POLYMER WHICH COMPRISES CONTACTING SAID A-MONOOLEFIN WITH A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF SODIUM TETRAPHENYLBORATE, ALUMINUM CHLORIDE AND A HALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM AND CHROMIUM AT A TEMPERATURE WITHIN THE RANGE OF -20*C. TO 300*C., THE WEIGHT RATIO OF SODIUM TETRAPHENYLBORATE TO ALUMINUM CHLORIDE IN SAID CATALYTIC MIXTURE BEING WITHIN THE RANGE OF 15:1 TO 1:1 AND THE WEIGHT RATIO OF ALUMINUM CHLORIDE TO TRANSITION METAL HALIDE IN SAID CATALYTIC MIXTURE BEING WITHIN THE RANGE OF 0.1:1 TO 3:1.
References Cited (Backward Citations)
US2728757A
Cited
US2728758A
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FR1134740A
Cited
BE543941A
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US2840551A
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FR1161213A
Cited
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Cited
FR1160864A
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US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |