US2453719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excessive potential discharge device
Assignee: ELECTRIC SERVICE Manufacturing Co
•
Filing: 1942-08-12
•
Granted: 1948-11-16
•
Expires: 1962-08-12
Abstract
No abstract record available.
Inventors
- 👤 Mcfarlin John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:16
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/02; H01T1/08; H01T1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2050397A
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FR760207A
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US2192773A
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US2151559A
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US2169110A
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US2177744A
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US2247352A
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US2262369A
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US2239940A
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US2357887A
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US2291175A
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US2332399A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |