US2777914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic switch
Assignee: Reliance Gauge Column Co
•
Filing: 1953-10-08
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Granted: 1957-01-15
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Expires: 1973-10-08
Abstract
No abstract record available.
Inventors
- 👤 Brown John Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:27
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/02; G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1397190A
Cited
US1834934A
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US2142680A
Cited
US2292648A
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US2356652A
Cited
US2467073A
Cited
US2671834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |