US3709840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing agent for epoxy resin comprising a cyclic anhydride treated with an amino alcohol
Assignee: Vanderbilt Chemicals LLC
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Filing: 1970-10-08
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Granted: 1973-01-09
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Expires: 1990-10-08
Abstract
Abstract THE SPECIFICATION RELATES TO TREATING AN ANHYDRIDE WITH AN AMINO ALCOHOL. THE TREATED ANHYDRIDE IS USED AS A CURING AGENT FOR EPOXY RESINS.
Inventors
- 👤 R Dehoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |