Patent US2699723A successfully refreshed from Google Patents.
US2699723A
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Sonic well-pumping apparatus
Assignee: PACIFIC PUMPS Inc
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Filing: 1949-12-15
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Granted: 1955-01-18
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Expires: 1969-12-15
Abstract
No abstract record available.
Inventors
- 👤 Murry F Ecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:21
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04F; F04F7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2213807A
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US2368346A
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US2368777A
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US2394189A
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US2442121A
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US2444912A
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US2553541A
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US2553542A
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US2572977A
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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) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |