US3728310A
Expired / Lapsed
US
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Mixed polyamines formed by the acidcatalyzed condensation of 3-chloroaniline,2,5-dichloroaniline,and formaldehyde as curing agents for polyurethanes
Assignee: Uniroyal Chemical Co Inc
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Filing: 1970-10-12
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Granted: 1973-04-17
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Expires: 1990-10-12
Abstract
Abstract THE MIXTURES OF POLAMINES FORMED BY THE ACID-CATALYZED CONDENSATION OF 3-CHLOROANILINE, 2,5-DICHLOROANILINE, AND FORMALDEHYDE IN CERTAIN RATIOS HAVE IMPROVED PROPERTIES FOR CURING POLYURETHANES. THEY ARE READILY BLANDED WITH THE LIQUID POLYURETHANE BECAUSE THEY ARE LIQUID OR HAVE LOW SOLIDIFICATION POINTS.
Inventors
- 👤 N Sundholm
- 👤 I Mankowich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
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 |