US3728302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat hardenable thickened epoxy resin masses
Assignee: Bayer Pharma AG
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Filing: 1971-06-07
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Granted: 1973-04-17
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Expires: 1991-06-07
Abstract
Abstract HEAT-HARDENABLE EPOXY RESIN MASSES RANGIN FROM A SOFT TO A BRITTLE CONSISTENCY PREPARED BY THICKENING, AT A TEMPERATURE FROM 20*C. TO 120*C., A MIXTURE OF (1) A 2+1ID EPOXY RESIN, (2) DICYANDIAMIDE, AND (3) A TERTIARY AMINE ACCELERATOR, IN THE PRESENCE OF A MONOAMINE OR DIAMINE. FURTHER HEATING OF THE MASSES AT 150*C.-180* C. CAUSES THE STORAGE-STABLE HARDENABLE MASSES TO HARDEN.
Inventors
- 👤 Dietrich Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/56; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |