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Patent US2923790A successfully refreshed from Google Patents.
US2923790A
Expired / Lapsed
US
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Positive action low pressure pump cutoff switch attachment
Assignee: Individual
•
Filing: 1957-12-27
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Granted: 1960-02-02
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Expires: 1977-12-27
Abstract
No abstract record available.
Inventors
- 👤 John J Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:12
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614; H01H35/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2741678A
Cited
US2680168A
Cited
US2765743A
Cited
US2767277A
Cited
US2692922A
Cited
US2741677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |