US2677093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector for direct-current potentials
Assignee: Bristol Co
•
Filing: 1948-10-06
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Granted: 1954-04-27
•
Expires: 1968-10-06
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Maltby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/025; H; H02; H02M; H02M7/00; H02M7/42; H02M7/54; H02M7/58; H02M7/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US928583A
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US1691986A
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US2300742A
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US2313527A
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US2298003A
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US2352299A
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US2385481A
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US2456420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |