US3629176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-resinous compositions containing a urea-formaldehyde reaction product and melamine
Assignee: Honeywell International Inc
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Filing: 1964-08-10
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Granted: 1971-12-21
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Expires: 1984-08-10
Abstract
Abstract A STABLE SLURRY COMPRISING A SUBSTANTIALLY UNREACTED MIXTURE OF (1) A PREFROMED ON-RESINOUS UREA-FORMALDEHYDE REACTION PRODUCT REACTED TO THE POLYMETHYL UREA STAGE, HAVING A MOL RATIO OF FROM 4.0 TO 7.3 MOLS OF FORMALDEHYDE PER MOL OF UREA AND A PH OF AT LEAST 7.0 IS MIXED WITH MELAMINE O UREA AND MELAMINE IN AN AMOUNT SUFFICIENT TO REDUCE THE FORMALDEHYDE TO NH2 GROUP RATIO TO 0.7 TO 1.0 MOL OF FROMALDEHYDE FOR EVERY MOL OF NH2 GROUP PRESENT. THE AMOUNT OF MELAMINE PRESENT IN THE MIXTURE IS AT LEAST 0.5% BY WEIGHT OF THE TOTAL UREA PLUS FORMALDEHYDE PRESENT.
Inventors
- 👤 Donald S Shriver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:13
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/34; C08G12/36; C08G12/38
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |