Patent US2993942A successfully refreshed from Google Patents.
US2993942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerized ethylene lubricating oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-12-08
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Granted: 1961-07-25
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Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Herschel T White
- 👤 Anthony J Passannante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:58
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF PREPARING A HYDROCARBON OIL HAVING A MINIMUM VISCOSITY INDEX ABOVE 140 AND A MOLECULAR WEIGHT IN THE RANGE OF 350 TO 800, SAID OIL BEING SUITABLE FOR LUBRICATING PURPOSES WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF A CATALYST CONSISTING OF A TITANIUM HALIDE AND AN ALUMINUM ALKYL COMPOUND HAVING THE FORMULA AIRNX3-N, N REPRESENTING A NUMBER OF AT LEAST 1 BUT LESS THAN 2 AT A TEMPERATURE IN THE RANGE OF -10 TO 15*C. IN THE PRESENCE OF A DILUENT COMPRISING AT LEAST 40 VOLUME PERCENT HALOGENATED AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF MONOCHLOROBENZENE AND DICHLOROBENZENE.
Claim 2
Independent Claim
102 words
A METHOD OF PREPARING A HYDROCARBON OIL HAVING A MINIMUM VISCOSITY INDEX ABOVE 140 AND A MOLECULAR WEIGHT IN THE RANGE OF 350 TO 800, SAID OIL BEING SUITABLE FOR LUBRICATING PURPOSES WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF A CATALYST CONSISTING OF A TITANIUM HALIDE AND AN ALUMINUM ALKYL COMPOUND HAVING THE FORMULA AIRNX3-N, N REPRESENTING A NUMBER OF AT LEAST 1 BUT LESS THAN 2 AT A TEMPERATURE IN THE RANGE OF -10 TO 15*C. IN THE PRESENCE OF A DILUENT COMPRISING AT LEAST 40 VOLUME PERCENT HALOGENATED AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF MONOCHLOROBENZENE AND DICHLOROBENZENE.
References Cited (Backward Citations)
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US2588425A
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US2907805A
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US2898329A
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US2827447A
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US2858902A
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US2846427A
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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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |