US2428563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground detector for electric power distribution systems
Assignee: Westinghouse Electric Corp
•
Filing: 1943-04-23
•
Granted: 1947-10-07
•
Expires: 1963-04-23
Abstract
No abstract record available.
Inventors
- 👤 Lawrence L Fountain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:46
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/16; G01R27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396582A
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US1115174A
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US1554704A
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US1822742A
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US1794686A
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US2022758A
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US2148136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |