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US2810351A
Expired / Lapsed
US
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Down-hole pump
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1956-08-22
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Granted: 1957-10-22
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Edward R Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190403152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |