Patent US2500725A successfully refreshed from Google Patents.
US2500725A
Expired / Lapsed
US
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Safety voltage detector
Assignee: Individual
•
Filing: 1945-05-08
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Granted: 1950-03-14
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Expires: 1965-05-08
Abstract
No abstract record available.
Inventors
- 👤 Albert E West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:50
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE456520C
Cited
US1615788A
Cited
US1684768A
Cited
US1723861A
Cited
GB236437A
Cited
US1644422A
Cited
US1831372A
Cited
GB476228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |