US2514347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of secondary aralkyl phenols
Assignee: Monsanto Chemicals Ltd
•
Filing: 1946-12-05
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Granted: 1950-07-04
•
Expires: 1966-12-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph I Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
C; C07; C07C; C07C37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE ISOMERIZATION OF 2HYDROXY-PHENYL-PHENYL-METHYL-METHANE TO 4HYDROXYPHENYL - PHENYL - METHYL - METHANE WHICH COMPRISES HEATING AT 45*C. TO 120*C. FOR 7 TO 65 HOURS 100 PARTS OF THE 2-HYDROXYPHENYLPHENYL-METHYL-METHANE IN CONTACT WITH PHENOL AND FROM 0.5 TO 10 PARTS OF A CATALYST TAKEN FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, HYDROGEN FLUORIDE, AND BORON TRI-FLUORIDE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE ISOMERIZATION OF 2HYDROXY-PHENYL-PHENYL-METHYL-METHANE TO 4HYDROXYPHENYL - PHENYL - METHYL - METHANE WHICH COMPRISES HEATING AT 45*C. TO 120*C. FOR 7 TO 65 HOURS 100 PARTS OF THE 2-HYDROXYPHENYLPHENYL-METHYL-METHANE IN CONTACT WITH PHENOL AND FROM 0.5 TO 10 PARTS OF A CATALYST TAKEN FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, HYDROGEN FLUORIDE, AND BORON TRI-FLUORIDE.
References Cited (Backward Citations)
US2247402A
Cited
US2441408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |