US3586658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins cured with anhydride residue
Assignee: Honeywell International Inc
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Filing: 1969-02-10
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Granted: 1971-06-22
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Expires: 1989-02-10
Abstract
Abstract OXIRANE-CONTAINING EPOXY RESINS MAY BE CURED BY REACTING THE EPOXY RESINS, OPTIONALLY IN MTHE PRESENCE OF HEAT AND/OR A SMALL AMOUNT OF A TERTIARY AMINE CATALYST, WITH THE VISCOUS ANHYDRIDE RESIDUE OBTAINED BY THE REACTION OF TETRAPROPYLENE WITH MALEIC ANHYDRIDE AFTER SUBSTANTIALLY COMPLETE REMOVAL OF UNREACTED SUBSTRATE AND DODECENYLSUCCINIC ANHYDRIDE FROM THE REACTION MIXTURE.
Inventors
- 👤 George S Wooster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:53
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/4261
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |