Patent US3677978A successfully refreshed from Google Patents.
US3677978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal salt complexes of imidazoles as curing agents for one-part epoxy resins
Assignee: PPG Industries Inc
•
Filing: 1971-08-23
•
Granted: 1972-07-18
•
Expires: 1991-08-23
Abstract
Abstract EPOXY RESINS ARE BLENDED WITH METAL SALT COMPLEXES OF IMIDAZOLES TO FORM COMPOSITIONS WHICH REMAIN IN THE UNCURED STATE FOR LONG PERIODS OF TIME AT ROOM TEMPERATURE AND CURE CONVENIENTLY AT ELEVATED TEMPERATURES. THESE EPOXY RESIN COMPOSITIONS MAY BE USED AS COATINGS, ADHESIVES, POTTING COMPOUNDS, CASTINGS AND LAMINATES.
Inventors
- 👤 Rostyslaw Dowbenko
- 👤 Carl C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:12
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5093
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |