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US2491751A
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Vertical deep well pump
Assignee: H C FRICK COKE Co
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Filing: 1947-11-25
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Granted: 1949-12-20
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Expires: 1967-11-25
Abstract
No abstract record available.
Inventors
- 👤 Edgar I Mcgee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:27
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/042; Y; Y10; Y10S; Y10S415/00; Y10S415/901
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) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |