Patent US3635894A successfully refreshed from Google Patents.
US3635894A
Expired / Lapsed
US
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Curable epoxy resin compositions containing organoimidazolium salt
Assignee: PPG Industries Inc
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Filing: 1969-11-06
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Granted: 1972-01-18
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Expires: 1989-11-06
Abstract
Abstract STORAGE-STABLE, CURABLE EPOXY RESIN COMPOSITIONS COMPRISE A MIXTURE OF AN EPOXY RESIN AND AN ORGANOIMIDAZOLIUM SALT. PREFERABLY, THE COMPOSITION INCLUDES A NITROGENOUS COMPOUND, SUCH AS UREA, DICYANDIAMIDE, MELAMINES OR THIOUREAS. THESE COMPOSITIONS ARE STORAGE-STABLE IN THE CURED STATE FOR LONG PERIODS OF TIME AT ROOM TEMPERATURE, BUT CAN BE EASILY CURED AT ELEVATED TEMPERATURES TO PROVIDE PRODUCTS HAVING EXCELLENT SHEER STRENGTH, PEEL STRENGTH AND OTHER PROPERTIES. THESE EPOXY RESIN COMPOSITIONS CAN BE USED AS COATINGS, ADHESIVES, POTTING COMPOUNDS, IN CASTINGS AND LAMINATES, AND FOR SIMILAR PURPOSES.
Inventors
- 👤 Rostyslaw Dowbenko
- 👤 Carl C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5093; C08G59/4007; C08G59/4014; C08G59/4021
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |