Patent US2793239A successfully refreshed from Google Patents.
US2793239A
Expired / Lapsed
US
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Alkylation of aromatic compounds
Assignee: California Research LLC
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Filing: 1955-03-14
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Granted: 1957-05-21
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jr William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:34
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C37/16; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/06; C07C2527/08; C07C2527/10; C07C2527/11; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS OF NUCLEAR ALKYLATION INVOLVING THE CONDENSATION OF AN ALKYLATING AGENT HAVING AN ALKYL GROUP OF AT LEAST THREE CARBON ATOMS AND AN AROMATIC HYDROCARBON, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONDENSATION AT ELEVATED TEMPERATURES AND PRESSURES IN THE PRESENCE OF A DILUTE AQUEOUS SOLUTION OF A STRONG ACID ACTING CATALYST, THE ACID ACTING CATALYST CONTENT OF THE SOLUTION BEING IN THE RANGE FROM ABOUT 0.05% TO ABOUT 10% BY WEIGHT.
Claim 2
Dependent Claim
73 words
IN A PROCESS OF NUCLEAR ALKYLATION INVOLVING THE CONDENSATION OF AN ALKYLATING AGENT HAVING AN ALKYL GROUP OF AT LEAST THREE CARBON ATOMS AND AN AROMATIC HYDROCARBON, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONDENSATION AT ELEVATED TEMPERATURES AND PRESSURES IN THE PRESENCE OF A DILUTE AQUEOUS SOLUTION OF A STRONG ACID ACTING CATALYST, THE ACID ACTING CATALYST CONTENT OF THE SOLUTION BEING IN THE RANGE FROM ABOUT 0.05% TO ABOUT 10% BY WEIGHT.
References Cited (Backward Citations)
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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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |