US2643239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen-containing polyethers and process for curing glycidyl polyethers to resinous products
Assignee: Shell Development Co
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Filing: 1951-03-28
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Granted: 1953-06-23
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Expires: 1971-03-28
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
- 👤 Herbert A Newey
- 👤 Theodore F Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:26
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G59/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR CURING A GLYCIDYL POLYETHER HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 TO A RESINOUS MATERIAL WHICH COMPRISES RESINIFYING SAID POLYETHER IN ADMIXTURE WITH THE PREFORMED REACTION PRODUCT FROM REACTION OF A GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY BETWEEN 1.0 AND 2.0 WITH A SECONDARY AMINE CONTAINING A SINGLE NITROGEN ATOM WHICH IS LINKED DIRECTLY TO TWO DIFFERENT CARBON ATOMS AND CONTAINING BESIDES THE SINGLE NITROGEN ATOM ONLY THE ELEMENTS CARBON AND HYDROGEN WHILE HAVING IN THE REACTION MIXTURE AT LEAST 1.5 MOLS OF SAID AMINE PER EPOXIDE EQUIVALENT WEIGHT OF SAID PHENOL-DERIVED POLYETHER.
Claim 2
Dependent Claim
100 words
A PROCESS FOR CURING A GLYCIDYL POLYETHER HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 TO A RESINOUS MATERIAL WHICH COMPRISES RESINIFYING SAID POLYETHER IN ADMIXTURE WITH THE PREFORMED REACTION PRODUCT FROM REACTION OF A GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY BETWEEN 1.0 AND 2.0 WITH A SECONDARY AMINE CONTAINING A SINGLE NITROGEN ATOM WHICH IS LINKED DIRECTLY TO TWO DIFFERENT CARBON ATOMS AND CONTAINING BESIDES THE SINGLE NITROGEN ATOM ONLY THE ELEMENTS CARBON AND HYDROGEN WHILE HAVING IN THE REACTION MIXTURE AT LEAST 1.5 MOLS OF SAID AMINE PER EPOXIDE EQUIVALENT WEIGHT OF SAID PHENOL-DERIVED POLYETHER.
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 |