Patent US2922194A successfully refreshed from Google Patents.
US2765322A
Expired / Lapsed
US
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Preparation of bis(4-glycidyloxyphenyl)-sulfone
Assignee: Rohm and Haas Co
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Filing: 1953-03-03
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Granted: 1956-10-02
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Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 Ellington M Beavers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
BIS (4-GLYCLYDLOXPHENYL)SULFONE HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
BIS (4-GLYCLYDLOXPHENYL)SULFONE HAVING THE FORMULA
Claim 3
Dependent Claim
87 words
A PROCESS FOR PREPARING BIS(4-GLYCIDYLOXYPHENYL)SULFONE WHICH COMPRISES HEATING A MIXTURE OF 4,4''-DIHYDROXYPHENYLSULFONE AND EPICHLORHYDRIN AT A TEMPERATURE FROM 80* TO 120* C. FROM THE GROUP CONSISTING OF INORGANIC BASES AND BASIC INORGANIC SALTS AND ADDING TO THE HEATED MIXTURE, A BASIC COMPOUND, CAPABLE OF NEUTRALIZING HYDROGEN CHLORIDE, AT SUCH A RATE THAT THE REACTION MIXTURE REMAINS NEUTRAL TO PHENOLPHTHALEIN INDICATOR, SAID EPICHLORHYDRIN BEING PRESENT IN AN AMOUNT EQUAL TO AT LEAST FOUR MOLES PER MOLE OF SAID SULFONE, AND THEREAFTER ISOLATING SAID BIS(4-GLYCIDYLOXYPHENYL)SULFONE FROM SAID REACTION MIXTURE.
Claim 4
Dependent Claim
87 words
A PROCESS FOR PREPARING BIS(4-GLYCIDYLOXYPHENYL)SULFONE WHICH COMPRISES HEATING A MIXTURE OF 4,4''-DIHYDROXYPHENYLSULFONE AND EPICHLORHYDRIN AT A TEMPERATURE FROM 80* TO 120* C. FROM THE GROUP CONSISTING OF INORGANIC BASES AND BASIC INORGANIC SALTS AND ADDING TO THE HEATED MIXTURE, A BASIC COMPOUND, CAPABLE OF NEUTRALIZING HYDROGEN CHLORIDE, AT SUCH A RATE THAT THE REACTION MIXTURE REMAINS NEUTRAL TO PHENOLPHTHALEIN INDICATOR, SAID EPICHLORHYDRIN BEING PRESENT IN AN AMOUNT EQUAL TO AT LEAST FOUR MOLES PER MOLE OF SAID SULFONE, AND THEREAFTER ISOLATING SAID BIS(4-GLYCIDYLOXYPHENYL)SULFONE FROM SAID REACTION MIXTURE.
References Cited (Backward Citations)
US2444333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |