US3132189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1, 2, 4, 5-tetrallkylbenzenes from pseudocumene and propylene
Assignee: Marathon Oil Co
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Filing: 1961-07-17
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Granted: 1964-05-05
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:37
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PREPARATION OF AHIGH YIELD OF MIXED 1,2,4,5-TETRAALKYLBENZENES WHICH COMPRISES HEATING PSEUDOCUMENE WITH PROPYLENE IN THE PRESENCE OF A CATALYTIC AMOUNT OF MOIST ALUMINUM TRICHLORIDE FOR A PERIOD OF FROM ONE TO FIVE HOURS AND IN A TEMPERATURE RANGE OF ABOUT 80-90*C., AND THEN SEPARATING FROM THE REACTION MIXTURE A MIXTURE OF 1-ISOPROPYL-2,4,5-TRIMETHYLBENZENE AND 1,2,4,5-TETRAMETHYLBENZENE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PREPARATION OF AHIGH YIELD OF MIXED 1,2,4,5-TETRAALKYLBENZENES WHICH COMPRISES HEATING PSEUDOCUMENE WITH PROPYLENE IN THE PRESENCE OF A CATALYTIC AMOUNT OF MOIST ALUMINUM TRICHLORIDE FOR A PERIOD OF FROM ONE TO FIVE HOURS AND IN A TEMPERATURE RANGE OF ABOUT 80-90*C., AND THEN SEPARATING FROM THE REACTION MIXTURE A MIXTURE OF 1-ISOPROPYL-2,4,5-TRIMETHYLBENZENE AND 1,2,4,5-TETRAMETHYLBENZENE.
References Cited (Backward Citations)
US2740819A
Cited
US2882324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |