Patent US2920169A successfully refreshed from Google Patents.
US2920169A
Expired / Lapsed
US
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Vacuumized electric switch
Assignee: Jennings Radio Manufacturing Corp
•
Filing: 1957-02-11
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Granted: 1960-01-05
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Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Jennings Jo Emmett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:45
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/6606; H01H2033/6613
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313856A
Cited
GB276641A
Cited
US1892538A
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DE578577C
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US1972362A
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US1905751A
Cited
USRE21087E
Cited
US2527475A
Cited
US2740867A
Cited
US2794101A
Cited
US2773154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |