Patent US2640866A successfully refreshed from Google Patents.
US2640866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque compensated galvanometer
Assignee: —
•
Filing: —
•
Granted: 1953-06-02
•
Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356579A
Cited
US2560257A
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US1743792A
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US1937754A
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US2136682A
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US2329423A
Cited
US2367614A
Cited
US2483644A
Cited
US2491305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |