US2928585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-rotor hydroturbine pump
Assignee: Guy F Atkinson Co
•
Filing: 1956-02-10
•
Granted: 1960-03-15
•
Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Dennis W Keef
- 👤 Eldon R Deardorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:57
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/005; F04C19/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US754871A
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US1094919A
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US1297692A
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US1421377A
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US1674453A
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US2195174A
Cited
US2211316A
Cited
US2302747A
Cited
US2364370A
Cited
US2639670A
Cited
US2672277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |