US3211670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of maintaining the activity and of regenerating the activity of used or spent acid activated montmorillonite catalyst
Assignee: GAF Chemicals Corp
•
Filing: 1964-04-16
•
Granted: 1965-10-12
•
Expires: 1984-04-16
Abstract
No abstract record available.
Inventors
- 👤 Kaplan Harry
- 👤 John A Hodgkiss
- 👤 Titus Z Trzaskowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:24
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF MAINTAINING AND REGENERATING THE ACTIVITY OF AN ALUMINUM HYDOSILICATE CLAY CATALYST USED IN THE ALKYLATION OF A PHENOLIC COMPOUND WITH AN OLEFINIC HYDROCARBON WHICH COMPRISES CONTACTING 1 PART BY WIGHT OF SAID CATALYST WITH 1 TO 100 PARTS BY WEIGHT OF AN OLEFINIC HYDROCARBON OF FROM 3 TO 25 CARBON ATOMS AT A TEMPERATURE RANGING FROM AMBIENT TO 200*C. FOR A PERIOD OF TIME SUFFICIENT TO RESTORE SAID CATALYST TO ACTIVITY.
Claim 2
Independent Claim
74 words
A METHOD OF MAINTAINING AND REGENERATING THE ACTIVITY OF AN ALUMINUM HYDOSILICATE CLAY CATALYST USED IN THE ALKYLATION OF A PHENOLIC COMPOUND WITH AN OLEFINIC HYDROCARBON WHICH COMPRISES CONTACTING 1 PART BY WIGHT OF SAID CATALYST WITH 1 TO 100 PARTS BY WEIGHT OF AN OLEFINIC HYDROCARBON OF FROM 3 TO 25 CARBON ATOMS AT A TEMPERATURE RANGING FROM AMBIENT TO 200*C. FOR A PERIOD OF TIME SUFFICIENT TO RESTORE SAID CATALYST TO ACTIVITY.
References Cited (Backward Citations)
US2784238A
Cited
US2891935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |