Patent US3598748A successfully refreshed from Google Patents.
US3598748A
Expired / Lapsed
US
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Aryldiamine and aldehyde reaction product curing agents for urethane resins
Assignee: Furane Plastics Inc
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Filing: 1967-11-15
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Granted: 1971-08-10
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Expires: 1987-11-15
Abstract
Abstract A CURING AGENT AND HARDENER SPECIFICALLY FOR URETHANE RESIN COMPOSITIONS, IS MADE BY PROCESSING 4,4''-METHYLENE BIS(2-CHLOROANILLINE) OR 3,3''-DICHLOROBENZIDINE, OR MIXTURES THEREOF, WITH SPECIFIC ACTIVE ALDEHYDE COMPOUNDS, WHICH AGENT IS A LIQUID, READILY DISPERSED IN A WIDE VARIETY URETHANE RESIN COMPOSITIONS, AND RESULTING IN ROOM TEMPERATURE CURING OF SAID URETHANE COMPOSITIONS.
Inventors
- 👤 Frank N Hirosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:19
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |