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US3479959A
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Electromagnetic metering pump
Assignee: WILLIAM N CHRISTENSEN
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Filing: 1967-10-23
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Granted: 1969-11-25
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Expires: 1987-10-23
Abstract
No abstract record available.
Inventors
- 👤 William N Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:23
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B53/1002; F01; F01M; F01M1/00; F01M1/02; F01M2001/0207; F01M2001/0223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2293684A
Cited
US3267866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |