Patent JPS5810739B2 successfully refreshed from Google Patents.
US2645765A
Expired / Lapsed
US
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Abnormal voltage indicating device
Assignee: DONALD R MIDDLETON
•
Filing: 1950-04-25
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Granted: 1953-07-14
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Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 William H Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:26
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/20; H02H3/207
Claims Analysis
Total Claims: 0
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |