US3832316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melamine-dicyandiamide-base resin solutions
Assignee: Canadian Patents and Development Ltd
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Filing: 1972-06-01
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Granted: 1974-08-27
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Expires: 1992-06-01
Abstract
Abstract RESIN SOLUTIONS SUITABLE PARTICULARLY FOR FIRE-RETARDANT AND ADHESIVE APPLICATIONS ARE PREPARED FROM MELAMINE, DICYANDIAMIDE, FORMALDEHYDE AND AN OXY-ACID OF PHOSPHORUS. THE MELAMINE AND DICYANDIAMIDE ARE DISSOLVED IN A HEATED ALKALINE FORMALDEHYDE SOLUTION, THE SOLUTION COOLED, AND THE OXY-ACID OF PHOSPHORUS SLOWLY ADDED, RESULTING IN CLEAR SOLUTIONS OF LONG POT-LIFE. FIRE-RETARDANT AND ADHESIVE PROPERTIES ARE EVALUATED.
Inventors
- 👤 S Juneja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G12/26; C08G12/34; B; B27; B27K; B27K3/00; B27K3/02; B27K3/15; B27K5/00; B27K5/0085
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |