Patent US3347169A successfully refreshed from Google Patents.
US3347169A
Expired / Lapsed
US
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Rotary well pump
Assignee: EVI-HIGHLAND PUMP Co
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Filing: 1966-09-26
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Granted: 1967-10-17
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Cronin
- 👤 Verdi E Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:39
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/126; E21B23/00; E21B23/02; F; F04; F04C; F04C13/00; F04C13/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1036824A
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US1980985A
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US2267459A
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US2346426A
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US2379944A
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US2464011A
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US2586360A
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US2739650A
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US2684639A
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US2898087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |