Patent US3128266A successfully refreshed from Google Patents.
US3128266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene
Assignee: Sunoco Inc
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Filing: 1960-12-23
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Granted: 1964-04-07
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Donald H Antonsen
- 👤 Richard S Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE IN AN INERT HYDROCARBON SOLVENT WITH A CATALYST SYSTEM PREPARED BY REACTING TITANIUM TETRACHLORIDE AND AN ALUMINUM ALKYL SESQUIHALIDE UNTIL AT LEAST INCIPIENT PRECIPITATION TAKES PLACE, AND THEN ADDING WATER, WHEREIN THE ATOMIC RATIO OF ALUMINUM TO TITANIUM IS FROM 0.25:1 TO 0.75:1, AND THE MOL RATIO OF WATER TO ALUMINUM IS FROM 1.8:1 TO 2.5:1, AND RECOVERING A SOLID POLYMER.
Claim 2
Dependent Claim
70 words
A PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE IN AN INERT HYDROCARBON SOLVENT WITH A CATALYST SYSTEM PREPARED BY REACTING TITANIUM TETRACHLORIDE AND AN ALUMINUM ALKYL SESQUIHALIDE UNTIL AT LEAST INCIPIENT PRECIPITATION TAKES PLACE, AND THEN ADDING WATER, WHEREIN THE ATOMIC RATIO OF ALUMINUM TO TITANIUM IS FROM 0.25:1 TO 0.75:1, AND THE MOL RATIO OF WATER TO ALUMINUM IS FROM 1.8:1 TO 2.5:1, AND RECOVERING A SOLID POLYMER.
References Cited (Backward Citations)
US2984658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |