Patent US2648285A successfully refreshed from Google Patents.
US2648285A
Expired / Lapsed
US
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Feed pump leak-off system
Assignee: Individual
•
Filing: 1948-12-08
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Granted: 1953-08-11
•
Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Sidney P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2018119A
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US2207809A
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US2272721A
Cited
US2393280A
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US2459166A
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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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |