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Patent US3394657A successfully refreshed from Google Patents.
US3394657A
Expired / Lapsed
US
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Electro-magnetic, reciprocating pumping mechanism
Assignee: Individual
•
Filing: 1966-05-27
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Granted: 1968-07-30
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 David H Sanders
- 👤 James M Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:03
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; F04B53/1025; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B17/046; F04B5/00; F04B5/02; F04B53/12; F04B53/125; F04B53/127; F04B53/129; F04B53/14; F04B53/144; F04B53/16; F04B53/162; F04B7/00; F04B7/04
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |