US3588644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus and stabilized dielectric therefor
Assignee: Cooper Industries LLC
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Filing: 1969-10-06
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Granted: 1971-06-28
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Expires: 1989-10-06
Abstract
Abstract A DIELECTRIC COMPOSITION FOR USE IN ELECTRICAL APPARATUS SUCH AS A CAPACITOR. THE COMPOSITION INCLUDES A HALOGENATED AROMATIC DIELECTRIC LIQUID WITH THE FOLLOWING ADDITIVE, 1, 2 EPOXY-3-PHENOXYPROPANE, AND WITH OR WITHOUT THE ADDITIVE, BIS (3, 4-EPOXY-6-METHYLCYCLOHEXYLMETHYL) ADIPATE. A PREFERRED COMPOSITION COMPRISES CHLORINATED DIPHENYL WITH ADDITIVES OF 0.15 PERCENT 1, 2, EPOXY-3-PHENOXYPROPANE AND 0.25 PERCENT BIS (3, 4-EPOXY-6-METHYLCYCLOHEXYLMETHYL) ADIPATE. THIS COMPOSITION HAS A LOWER DISSIPATION FACTOR AND A PROLONGED LIFE CHARACTERISTIC.
Inventors
- 👤 William H Nash
- 👤 John Franklin Lapp
- 👤 Fred S Sadler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |