US3143537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization using an aluminum alkyl-transition element compound-alkali metal fluoride catalyst composition
Assignee: Eastman Kodak Co
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Filing: 1959-03-05
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Granted: 1964-08-04
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Expires: 1979-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
- 👤 Marvin B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A PROCESS FOR THE POLYMERIZATON OF A-MONOOLEFINIC HYDROCARBONS CONTAINING 3 TO 10 CARBON ATOMS TO SOLID CRYSTALLINE POLYMER WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A CATALYTIC MIXTURE SUBSTANTIALLY FREE OF UNREACTED HALIDE AND HAVING BEEN PREPARED BY REACTING AN ALUMINUM TRIALKYL WHEREIN THE ALKYL RADICALS CONTAIN FROM 1 TO 12 CARBON ATOMS, A HALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, CHROMIUM, MOLYBDENUM AND ZIRCONIUM AND AN ALKALI METAL FLUORIDE, FROM 0.5 TO 12 MOLES OF ALKALI METAL FLUORIDE PER MOLE OF TRANSITION METAL HALIDE HAVING BEEN EMPLOYED IN SAID REACTION.
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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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |