US3149097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing crystalline polyolefins in the presence of an aluminum trialkyl, transition metal halide, and an esterified polyhydric alcohol
Assignee: Eastman Kodak Co
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Filing: 1961-03-01
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Granted: 1964-09-15
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Expires: 1981-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Frederick B Joyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
IN THE POLYMERIZATION OF A-MONOOLEFINIC HYDROCARBON MATERIAL CONTAINING 3 TO 10 CARBON ATOMS TO FORM SOLID CRYSTALLINE POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE CONTAINING AN ALUMINUM COMPOUND HAVING THE FORMULA R3AL WHEREIN R IS A HYDROCARBON RADICAL CONTAINING 1 TO 12 CARBON ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL, A HALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND VANADIUM, AND AN ESTER HAVING THE FORMULA RCOOR1 WHEREIN R HAS THE FORMULA -(CH2)NCOOR2 WHEREIN N IS A NUMBER FROM 0 TO 4 AND R1 AND R2 ARE ALKYL RADICALS CONTAINING 1 TO 4 CARBON ATOMS.
References Cited (Backward Citations)
US2905645A
Cited
US2965627A
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 |