Patent US3448392A successfully refreshed from Google Patents.
US3448392A
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US
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Fault detecting and eliminating system for electrical circuits
Assignee: International Standard Electric Corp
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Filing: 1965-03-30
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Granted: 1969-06-03
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Expires: 1985-03-30
Abstract
No abstract record available.
Inventors
- 👤 Pierre Charransol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:56
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/08; H04M3/12; H04Q; H04Q1/00; H04Q1/18; H04Q1/20; H04Q1/22; H04Q1/24
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |