US3578728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid unsaturated polyesters and polyester urethanes containing cross-linked particles of the same resins
Assignee: Armstrong World Industries Inc
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Filing: 1968-11-18
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Granted: 1971-05-11
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Expires: 1988-11-18
Abstract
Abstract BLENDS OF PARTICLES OF CROSS-LINKED UNSATURATED POLYESTER RESINS AND FLUID UNSATURATED POLYESTER RESINS. THE BLENDS POSSESS PROPERTIES UNIQUE TO UNSATURATED POLYESTER RESINS. IN THAT THEY MAY BE READILY PROCESSED USING A VARIETY OF TECHNIQUES NOT COMMONLY ASSOCIATED WITH UNSATURATED POLYESTER RESINS AND THE BLENDS ARE READILY CURABLE TO FORM USEFUL ARTICLES. THE CROSS-LINKED PARTICLES USED IN FORMING THE BLENDS ARE CONVENIENTLY PRODUCED BY SUBJECTING THE UNSATURATED POLYESTER RESIN TO MASTICATION DURING OR AFTER POLYMERIZATION.
Inventors
- 👤 Wendell A Ehrhart
- 👤 Clarence E Rohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G18/683; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08L75/00; C08L75/04; C08L75/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |