Patent US2948713A successfully refreshed from Google Patents.
US2948713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing high molecular weight linear hydrocarbon polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1957-07-05
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Granted: 1960-08-09
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Lemiszka Theodore
- 👤 Stanley B Mirviss
- 👤 Kirshenbaum Isidor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES INTIMATELY CONTACTING THE OLEFIN WITH A CATALYST CONSISTING OF A TRIISOALKYL ALUMINUM COMPOUND IN AN INERT HYDROCARBON DILUENT, THE CATALYST CONCENTRATION IN THE DILUENT BEING IN THE RANGE OF ABOUT 15 TO 80WT. PERCENT UNDER A PRESSURE OF 500 TO 10,000 P.S.I.G. AT 10 TO 150* C. UNTIL AN ESSENTIALLY LINEAR, SOLID PLYMER HAVING A HARRIS MOLECULAR WEIGHT OF 100,000 TO 3,000,000 IS RECOVERED.
Claim 2
Dependent Claim
71 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES INTIMATELY CONTACTING THE OLEFIN WITH A CATALYST CONSISTING OF A TRIISOALKYL ALUMINUM COMPOUND IN AN INERT HYDROCARBON DILUENT, THE CATALYST CONCENTRATION IN THE DILUENT BEING IN THE RANGE OF ABOUT 15 TO 80WT. PERCENT UNDER A PRESSURE OF 500 TO 10,000 P.S.I.G. AT 10 TO 150* C. UNTIL AN ESSENTIALLY LINEAR, SOLID PLYMER HAVING A HARRIS MOLECULAR WEIGHT OF 100,000 TO 3,000,000 IS RECOVERED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |