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US2523939A
Expired / Lapsed
US
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Preparation of substituted phenols
Assignee: Reichhold Chemicals Inc
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Filing: 1946-11-25
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Granted: 1950-09-26
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Expires: 1966-11-25
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Braidwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR PREPARING PARA TERTIARY BUTYL PHENOL WHICH COMPRISES REACTING SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF ISOBUTYLENE AND PHENOL IN LIQUID PHASE AT A PRESSURE OF AT LEAST EQUAL TO SUBSTANTIALLY ATMOSPHERIC AND AT A TEMPERATURE BELOW ABOUT 50*C. IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND OF A CATALYST COMPRISING ESSENTIALLY FLUOSULFONIC ACID.
Claim 2
Dependent Claim
54 words
A PROCESS FOR PREPARING PARA TERTIARY BUTYL PHENOL WHICH COMPRISES REACTING SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF ISOBUTYLENE AND PHENOL IN LIQUID PHASE AT A PRESSURE OF AT LEAST EQUAL TO SUBSTANTIALLY ATMOSPHERIC AND AT A TEMPERATURE BELOW ABOUT 50*C. IN THE PRESENCE OF AN INERT ORGANIC SOLVENT AND OF A CATALYST COMPRISING ESSENTIALLY FLUOSULFONIC ACID.
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) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |