Patent US88695A successfully refreshed from Google Patents.
US2700501A
Expired / Lapsed
US
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Voltage detector
Assignee: Individual
•
Filing: 1951-12-28
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Granted: 1955-01-25
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Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Wang An
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/25; G01R19/255; H; H03; H03M; H03M1/00; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2407320A
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US2486390A
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US2471168A
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US2453454A
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US2601491A
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US2652194A
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US2599675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |