US3697462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid curing agent for epoxy resins comprising a mixture of an imidazole and an aniline-formaldehyde condensate
Assignee: Vanderbilt Chemicals LLC
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Filing: 1970-09-21
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Granted: 1972-10-10
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Expires: 1990-09-21
Abstract
Abstract THE SPECIFICATION RELATES TO A LIQUID CURING AGENT FOR EPOXY RESINS. THE CURING AGENT CONTAINS AN IMIDAZOLE COMPOUND AS A FIRST COMPONENT, AN ANILINEFORMALDEHYDE CONDENSATE HAVING A MOLAR RATIO FROM 1.6:1 TO 1.7:1 AS A SECOND COMPONENT AND A REACTIVE AMINE DILUENT AS AN OPTIONAL THIRD COMPONENT. THE SPECIFICATION ALSO RELATES TO EPOXY RESIN CURED WITH THIS CURING AGENT.
Inventors
- 👤 Ronald Lee De Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/5073; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; C08G59/5033; C08L; C08L63/00
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |