US2874193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of ortho-alkyl phenols
Assignee: Shell Development Co
•
Filing: 1956-09-26
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Granted: 1959-02-17
•
Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Dijkstra Renger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:24
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PREPARATION OF AN ORTHO-SUBSTITUTED MONOALKYL PHENOL, WHICH COMPRISES PRETREATING AN ALUMINUM SILICATE CATALYST WITH HYDROGEN FLUORIDE UNTIL IT CONTAINS FROM ABOUT 1% TO ABOUT 5% BY WEIGHT OF CHEMICALLY COMBINED FLUORINE, AND REACTING A MONOOLEFIN HAVING FROM 14 TO 18 CARBONS ATOMS WITH A SUBSTANTIALLY EQUIMOLAR AMOUNT OF PHENOL IN INTIMATE CONTACT WITH 1% TO 20% BY WEIGHT, BASED ON THE REACTANTS, OF SAID CATALYST, AT A TEMPERATURE BETWEEN 150*C. AND 300* C, AND AT ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PREPARATION OF AN ORTHO-SUBSTITUTED MONOALKYL PHENOL, WHICH COMPRISES PRETREATING AN ALUMINUM SILICATE CATALYST WITH HYDROGEN FLUORIDE UNTIL IT CONTAINS FROM ABOUT 1% TO ABOUT 5% BY WEIGHT OF CHEMICALLY COMBINED FLUORINE, AND REACTING A MONOOLEFIN HAVING FROM 14 TO 18 CARBONS ATOMS WITH A SUBSTANTIALLY EQUIMOLAR AMOUNT OF PHENOL IN INTIMATE CONTACT WITH 1% TO 20% BY WEIGHT, BASED ON THE REACTANTS, OF SAID CATALYST, AT A TEMPERATURE BETWEEN 150*C. AND 300* C, AND AT ATMOSPHERIC PRESSURE.
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |