US2517862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacity pump
Assignee: Individual
•
Filing: 1947-06-05
•
Granted: 1950-08-08
•
Expires: 1967-06-05
Abstract
No abstract record available.
Inventors
- 👤 Rheuel H Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19783E
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US1444712A
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DE429825C
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CH122424A
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US1669976A
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US1743977A
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US2020611A
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GB452829A
Cited
US2377886A
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US2439668A
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US2466623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |