Patent US2688594A successfully refreshed from Google Patents.
US2634684A
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US
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Electromagnetically operated pump for raising liquids
Assignee: Individual
•
Filing: 1951-01-29
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Granted: 1953-04-14
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Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Alvarez Francisco Felez
- 👤 Alvarez Jose Felez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:30
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/04; F; F04; F04B; F04B43/00; F04B43/02; F04B43/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US800356A
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US854670A
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US2043270A
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US2144662A
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US2273896A
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US2298402A
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US2430151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |