US2626569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift for deep well hydraulic pumps
Assignee: Individual
•
Filing: 1946-10-03
•
Granted: 1953-01-27
•
Expires: 1966-10-03
Abstract
No abstract record available.
Inventors
- 👤 Elmo M Knudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B47/00; F04B47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB287267A
Cited
US1851666A
Cited
US2046491A
Cited
US2196993A
Cited
US2455022A
Cited
US2489505A
Cited
US2404524A
Cited
US2435179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |