US2907748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing epoxy resins
Assignee: Hexion Inc
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Filing: 1957-02-19
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Granted: 1959-10-06
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 David J Lieb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5006; C08G59/62; C08G59/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN POLYMERIZING AN EPOXIDE RESIN THAT IS POLYMERIZABLE BY AN ALKYLENE POLYAMINE AND IS SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL ETHERS OF POLYHYDRIC PHENOLS AND POLYHYDRIC ALCOHOLS, THE PROCESS WHICH COMRPISES MIXING 100 PARTS OF THE RESIN WITH ABOUT 5-20 PARTS OF A CURING COMPOSITION CONSISTING ESSENTIALLY OF A HOMOGENEOUS MIXTURE OF ALKYLENE POLYAMINE AND A BETA-MONOHYDROXY TERTIARY ALIPHATIC MONOAMINE IN THE PROPORTION OF APPROXIMATELY 5%-40% OF THE POLYAMINE ON THE TOTAL WEIGHT OF AMINES, AND MAINTAINING CONTACT BETWEEN THE RESINS AND THE CURING AGENT WITHOUT HEATING UNTIL POLYMERIZATION IS EFFECTED.
Claim 2
Dependent Claim
92 words
IN POLYMERIZING AN EPOXIDE RESIN THAT IS POLYMERIZABLE BY AN ALKYLENE POLYAMINE AND IS SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL ETHERS OF POLYHYDRIC PHENOLS AND POLYHYDRIC ALCOHOLS, THE PROCESS WHICH COMRPISES MIXING 100 PARTS OF THE RESIN WITH ABOUT 5-20 PARTS OF A CURING COMPOSITION CONSISTING ESSENTIALLY OF A HOMOGENEOUS MIXTURE OF ALKYLENE POLYAMINE AND A BETA-MONOHYDROXY TERTIARY ALIPHATIC MONOAMINE IN THE PROPORTION OF APPROXIMATELY 5%-40% OF THE POLYAMINE ON THE TOTAL WEIGHT OF AMINES, AND MAINTAINING CONTACT BETWEEN THE RESINS AND THE CURING AGENT WITHOUT HEATING UNTIL POLYMERIZATION IS EFFECTED.
References Cited (Backward Citations)
US2783214A
Cited
US2723241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |