US2690128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pumping device
Assignee: North American Solvay Inc
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Filing: 1950-03-24
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Granted: 1954-09-28
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Basilewsky Alexis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/04; F04B1/00; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B5/00; F04B5/02
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |