US2777028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic pressure switch
Assignee: Individual
•
Filing: 1954-09-17
•
Granted: 1957-01-08
•
Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
- 👤 James M Kendall
- 👤 George A Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:21
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614; H01H35/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2317271A
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US2371669A
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US2350938A
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US2392077A
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US2450961A
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US2637999A
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US2582483A
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US2510460A
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US2632474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |