Patent US2930820A successfully refreshed from Google Patents.
US2930820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of toluene
Assignee: Individual
•
Filing: 1957-09-16
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Granted: 1960-03-29
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Robert S Aries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
METHOD FOR THE ALKYLATION OF TOLUENE WHICH COMPRISES REACTING TOLUENE IN THE LIQUID PHASE AT SUBSTANTIALLY ATMOSPHERE PRESSURE WITH AN OLEFIFIN AT A TEMPERATURE BETWEEN ABOUT 90* AND 110* C. IN THE PRESENCE OF AN ALKYLATION CATALYST COMPRISING ACTIVATED MONTMORILLONITE CLAY WHICH HAS BEEN ACID-TREATED, WASHED WITH WATER UNTIL SUBSTANTIALLY FREED FROM CALCIUM IONS AND SHOWING ONLY SLIGHT RESIDUAL ACIDITY AND THEN TREATED WITH A METAL SALT SOLUTION TO PRECIPITATE AN OXIDE OF SAID METAL THEREON.
Claim 2
Dependent Claim
76 words
METHOD FOR THE ALKYLATION OF TOLUENE WHICH COMPRISES REACTING TOLUENE IN THE LIQUID PHASE AT SUBSTANTIALLY ATMOSPHERE PRESSURE WITH AN OLEFIFIN AT A TEMPERATURE BETWEEN ABOUT 90* AND 110* C. IN THE PRESENCE OF AN ALKYLATION CATALYST COMPRISING ACTIVATED MONTMORILLONITE CLAY WHICH HAS BEEN ACID-TREATED, WASHED WITH WATER UNTIL SUBSTANTIALLY FREED FROM CALCIUM IONS AND SHOWING ONLY SLIGHT RESIDUAL ACIDITY AND THEN TREATED WITH A METAL SALT SOLUTION TO PRECIPITATE AN OXIDE OF SAID METAL THEREON.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |