US3560445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature unsaturated polyester
Assignee: Beazer East Inc
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Filing: 1967-06-05
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Granted: 1971-02-02
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Expires: 1987-06-05
Abstract
Abstract AN UNSATURATED POLYESTER, HAVING EXCELLENT ELECTRICAL AND HIGH TEMPERATURE PROPERTIES WHEN COPOLYMERIZED WITH A MONOMER SUCH AS STYRENE OR VINYL TOLUENE IS FORMED BY REACTING 1,4-CYCLOHEXANE DIMETHANOL AND A SECOND DIHYDRIC ALCOHOL SUCH AS ETHYLENE GLYCOL OR NEOPENTYL GYLCOL WITH MALEIC ANHYDRIDE AND AN UNSATURATED, HYDROGENATED AROMATIC DICARBOXYLIC ACID SUCH AS TETRAHYDROPHTHALIC ANHYDRIDE. THE COPOLYMERIZED POLYESTER RESIN IS USEFUL IN ELECTRICAL APPLICATIONS AS A REPLACEMENT FOR WOOD, CERAMICS, AND RUBBER MATERIALS OR THE LIKE.
Inventors
- 👤 Frank Fekete
- 👤 John S Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:29
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553; H01B3/421; H01B3/425
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |