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US3440375A
Expired / Lapsed
US
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Float-type mercury switch with stabilizing means
Assignee: JAMES P WOOD
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Filing: 1966-09-09
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Granted: 1969-04-22
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Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 James P Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:59
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/20; G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/68; G01F23/70; G01F23/703; G01F23/76; H01H35/00; H01H35/18; H01H35/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |