Patent US3458764A successfully refreshed from Google Patents.
US3458764A
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Protective system for capacitive voltage transformers
Assignee: Micafil AG
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Filing: 1967-03-07
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Granted: 1969-07-29
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Expires: 1987-03-07
Abstract
No abstract record available.
Inventors
- 👤 Georges Albert Gertsch
- 👤 Walter Knoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
H; H01; H01G; H01G2/00; G; G01; G01R; G01R15/00; G01R15/04; G01R15/06; H02; H02H; H02H1/00; H02H7/00; H02H7/04; H02H7/05; H02H9/00; H02H9/005; H02H9/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |