US2800512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing alkylated hydroxy aromatic compounds
Assignee: General Electric Co
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Filing: 1955-01-07
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Granted: 1957-07-23
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Expires: 1975-01-07
Abstract
No abstract record available.
Inventors
- 👤 Charles T Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF PREPARING ALKYLATED HYDROXY AROMATIC COMPOUNDS WHICH COMPRISES THE SEQUENTIAL STEPS OF (1) MIXING TOGETHER A PHENOL HAVING AT LEAST ONE UNSUBSTITUTED NUCLEAR CARBON ATOM AND A SMALL QUANTITY OF A FRIEDELCRAFTS CATALYST, (2) ADDING TO THE RESULTING MIXTURE A LONGCHAIN CHLORINATED ALIPHATIC HYDROCARBON HAVING FROM 12 TO 30 CARBON ATOMS AND CONTAINING FROM ABOUT 15 TO 45 PERCENT, BY WEIGHT OF CHLORINE, AT A RATE WHICH AVOIDS LARGE CONCENTRATIONS OF UNREACTED CHLORINATED HYDROCARBON,WHILE MAINTAINING A REACTION TEMPERATURE OF FROM ABOUT 100* TO ABOUT 200*C. UNTIL THE EVOLUTION OF HYDROGEN CHLORIDE HAS SUBSTANTIALLY CEASED, (3) WASHING THE REACTION MIXTURE WHEREBY RESIDUAL CATALYST IS HYDROLYZED, AND (4) RECOVERING AN ALKYLATED PHENOL.
References Cited (Backward Citations)
US2039344A
Cited
US2191499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |