US3795657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions containing aromatic biguanides as latent curing agents therefor
Assignee: Dow Chemical Co
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Filing: 1972-08-21
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Granted: 1974-03-05
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Expires: 1992-08-21
Abstract
Abstract NEW COMPOUNDS USEFUL AS LATENT CURING AGENTS FOR EPOXY RESINS ARE PREPARED BY REACTING AN AROMATIC DIAMINE, E.G. METHYLENEDIANILINE, WITH DICANDIAMIDE. THESE LATENT CURING AGENTS WILL CURE EPOXY RESIBNS WITH OR WITHOUT ACCELERATORS IN SHORTER TIMES THAN ACCELERATED DICYANDIAMIDE CURED SYSTEMS AND AT LOWER TEMPERATURES THAN INACELLERATED DICYANIDIAMIDE SYSTEMS.
Inventors
- 👤 R Howsam
- 👤 P Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
C; C07; C07C; C07C279/00; C07C279/20; C07C279/24; C07C279/26; C07C279/265; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |