US2804516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sump pump liquid level control switch
Assignee: General Electric Co
•
Filing: 1954-02-25
•
Granted: 1957-08-27
•
Expires: 1974-02-25
Abstract
No abstract record available.
Inventors
- 👤 Louis E Staak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:07
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/18; F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2320121A
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US2429440A
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US2395007A
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US2435716A
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US2428096A
Cited
US2503594A
Cited
US2553291A
Cited
US2635546A
Cited
US2687693A
Cited
US2625107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |