Patent US2997609A successfully refreshed from Google Patents.
US2997609A
Expired / Lapsed
US
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Starting switch for submersible pumps
Assignee: Tait Manufacturing Co
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Filing: 1957-07-25
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Granted: 1961-08-22
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Expires: 1977-07-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Lung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H29/00; H01H29/20; H02; H02K; H02K17/00; H02K17/02; H02K17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946165A
Cited
US2055480A
Cited
US2219199A
Cited
FR897231A
Cited
US2539048A
Cited
US2752516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |