US2643243A
Expired / Lapsed
US
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Curing glycidyl polyethers of dihydric phenols with sulfonic acids
Assignee: Shell Development Co
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Filing: 1951-02-26
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Granted: 1953-06-23
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Expires: 1971-02-26
Abstract
No abstract record available.
Inventors
- 👤 Dannenberg Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/18; C08G59/40; C08G59/4007; C08G59/4064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS OF RESINIFYING GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND HAVING AS FUNCTIONAL GROUPS ONLY EPOXY AND HYDROXYL GROUPS WHICH COMPRISES COMMINGLING SAID POLYETHER WITH 0.1 TO 5% BY WEIGHT OF A REACTANT CONSISTING OF A SUBSTITUTED HYDROCARBON FREE OF OTHER SUBSTITUENT GROUPS THAN ONE TO THREE SINGLE MEMBERS OF THE CLASS CONSISTING OF SULFONIC ACID AND SULFONYL HALIDE GROUPS, AND PERMITTING THE RESULTING MIXTURE TO RESINIFY AND CURE TO A SOLID RESINOUS PRODUCT.
Claim 2
Dependent Claim
82 words
A PROCESS OF RESINIFYING GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND HAVING AS FUNCTIONAL GROUPS ONLY EPOXY AND HYDROXYL GROUPS WHICH COMPRISES COMMINGLING SAID POLYETHER WITH 0.1 TO 5% BY WEIGHT OF A REACTANT CONSISTING OF A SUBSTITUTED HYDROCARBON FREE OF OTHER SUBSTITUENT GROUPS THAN ONE TO THREE SINGLE MEMBERS OF THE CLASS CONSISTING OF SULFONIC ACID AND SULFONYL HALIDE GROUPS, AND PERMITTING THE RESULTING MIXTURE TO RESINIFY AND CURE TO A SOLID RESINOUS PRODUCT.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |