Molded epoxy resin electrical insulating body containing alumina and silica
Abstract
Abstract THERE IS PROVIDED A RESINOUS MOLDED INSULATING DEVICE, E.G. A LINE POST INSULATOR, HAVING IMPROVED TRACKING CHARACTERISTICS AT HIGH VOLTAGES FORMED FROM AN ALICYCLIC DIEPOXY CARBOXYLATE WHIC ENABLES A SUBSTANTIAL REDUCTION IN THE AMOUNT OF HYDRATED ALUMINA CONTAINED IN THE RESINOUS BODY OVER THAT REQUIRED WITH OTHER REINS. THE INVENTION ALSO RELATES TO A METHOD OF PRODUCING THESE PRODUCTS CHARACTERIZED BY THE ABILITY TO INTERRUPT THE HARDENING REACTION OCCURRING WITH THE COMPOSITIONS AT THE GEL STAGE WHEN THE RPDUCT IS QUITE RUBBERY BUT COHESIVE WHEREBY THE PRODUCT IS REMOVED FROM THE MOLD IN THE PARTIALLY CURED STATE AND THE CURE IS COMPLETED OUTSIDE THE MOLD. D R A W I N G
Inventors
- 👤 Donald H Linson
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |