US2674189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping system and method of operation
Assignee: Dayton Pump and Manufacturing Co
•
Filing: 1952-01-04
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Granted: 1954-04-06
•
Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Lung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/58; B67D7/62; B67D7/76; B67D7/763
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724262A
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US1823459A
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US1856105A
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US2148131A
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US2176658A
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US2545915A
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US2608157A
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US2651259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |