US3594439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerators for polyester resins
Assignee: PPG Industries Inc
•
Filing: 1967-12-22
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Granted: 1971-07-20
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Expires: 1987-12-22
Abstract
Abstract POLYESTER RESIN COMPOSITIONS COMPRISING POLYESTERS OF ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACIDS AND POLYHYDRIC ALCOHOLS AND ACCELERATORS FOR THE PEROXIDE CURE OF THE POLYESTERS ARE TREATED WITH FROM ABOUT 0.001 TO ABOUT 0.9 WEIGHT PERCENT OF THE RESIN OF FREE ALKYLENE GLYCOL HAVING UP TO 6 CARBON ATOMS TO ACCELERATE THE GEL TIME OF THE POLYESTERS. THE CURED POLYESTER COMPOSITIONS ARE USEFUL AS COATINGS, CASTINGS AND LAMINATES.
Inventors
- 👤 John G Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |