Patent US2782794A successfully refreshed from Google Patents.
US2834845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sump pump control
Assignee: Individual
•
Filing: 1956-03-12
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Granted: 1958-05-13
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Axel L Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218; G; G05; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2305154A
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US2320121A
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US2395657A
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US2421149A
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US2481612A
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US2591852A
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US2635546A
Cited
US2687693A
Cited
US2640977A
Cited
US2680168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |