Patent US4637024A successfully refreshed from Google Patents.
US2867673A
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Side-chain alkylation in the presence of a lead tetraalkyl catalyst
Assignee: Universal Oil Products Co
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Filing: 1954-05-14
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Granted: 1959-01-06
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chenicek
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:42
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/72; C07C2531/00; C07C2531/02; C07C2531/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE SIDE CHAIN ALKYLATION OF AN ALKYLBENZENE IN WHICH AT LEAST ONE HYDROGEN ATOM IS DIRECTLY ATTACHED TO THE ALPHA CARBON GROUP, WHICH COMPRISES REACTING SAID ALKYLBENZENE WITH AN ALKENE AT CONDENSATION CONDITIONS INCLUDING A TEMPERATURE OF FROM ABOUT 50* TO ABOUT 400* C. AND A PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 200 ATMOSPHERES IN THE PRESENCE OF A LEAD TETRAALKYL CATALYST WHICH FORMS FREE RADICALS AT SAID CONDITIONS.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE SIDE CHAIN ALKYLATION OF AN ALKYLBENZENE IN WHICH AT LEAST ONE HYDROGEN ATOM IS DIRECTLY ATTACHED TO THE ALPHA CARBON GROUP, WHICH COMPRISES REACTING SAID ALKYLBENZENE WITH AN ALKENE AT CONDENSATION CONDITIONS INCLUDING A TEMPERATURE OF FROM ABOUT 50* TO ABOUT 400* C. AND A PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 200 ATMOSPHERES IN THE PRESENCE OF A LEAD TETRAALKYL CATALYST WHICH FORMS FREE RADICALS AT SAID CONDITIONS.
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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |