US2489505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well pump
Assignee: Individual
•
Filing: 1944-11-28
•
Granted: 1949-11-29
•
Expires: 1964-11-28
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:27
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/053; F03C1/0535; F03C1/0536; F04; F04B; F04B1/00; F04B1/04; F04B1/053; F04B1/0536; F04B1/0538; F04B43/00; F04B43/02; F04B43/06; F04B43/067; F04B43/08; F04B43/086; F04B43/10; F04B43/107; F04B47/00; F04B47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US225930A
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US283036A
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US1211680A
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US2291912A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |