US3560443A
Expired / Lapsed
US
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Selected 4,4' - methylene bis(2-alkyl-6-methylanilines) as curing agents for epoxy resins
Assignee: Uniroyal Chemical Co Inc
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Filing: 1968-09-23
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Granted: 1971-02-02
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Expires: 1988-09-23
Abstract
Abstract EPOXY RESINS ARE CURED WITH 4,4''-METHYLENEBIS(2-ALKYL6-METHYLANILINES) HAVING THE STRUCTURAL FORMULA: BIS(3-CH3,4-NH2,5-R-PHENYL)-CH2 WHERE R IS AN ETHYL GROUP OR A SECONDARY ALKYL GROUP HAVING 3 TO 6 CARBON ATOMS.
Inventors
- 👤 Norman K Sundholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |