Patent US3619745A successfully refreshed from Google Patents.
US3619745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor having an impregnated dielectric
Assignee: US Philips Corp
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Filing: 1969-10-07
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Granted: 1971-11-09
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Expires: 1989-10-07
Abstract
Abstract A capacitor having a dielectric impregnated with a nonthermohardening epoxy resin.
Inventors
- 👤 Michel Perigord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:32
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A capacitor as claimed in claim 1 characterized in that a. the epoxy resin has a relative permittivity higher than 3. preferably between 5 and 12; b. the degree of polymerization of the resin lies between 0 and 1.2; c. the viscosity of the resin remains below 600,000 centipoises at the minimum operational temperature of the capacitor; d. the viscosity of the resin is lower than 100,000 centipoises at the maximum operational temperature; e. the capacitor is enclosed in an opaque, airtight casing.
References Cited (Backward Citations)
US3424957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |