Patent US2856481A successfully refreshed from Google Patents.
US2856481A
Expired / Lapsed
US
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Low pressure pump cut-off switch
Assignee: Individual
•
Filing: 1955-07-18
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Granted: 1958-10-14
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 John J Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:43
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US552803A
Cited
US2086264A
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FR963901A
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FR800514A
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CH200159A
Cited
US2423387A
Cited
US2456994A
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US2583139A
Cited
US2632119A
Cited
US2765743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |