Patent US4488739A successfully refreshed from Google Patents.
Patent US2268806A successfully refreshed from Google Patents.
US2268806A
Expired / Lapsed
US
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By-pass valve for aircraft fuel pumps
Assignee: CURTIS PUMP CO
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Filing: 1940-03-15
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Granted: 1942-01-06
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Expires: 1960-03-15
Abstract
No abstract record available.
Inventors
- 👤 Russell R Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:57
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/02; F02M37/00; F02M37/04; F02M59/00; F04; F04C; F04C14/00; F04C15/00; F02M2700/00; F02M2700/13; F02M2700/1317; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-05 | 1945-07-07 | 1946-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-05 | 1949-07-07 | 1950-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-05 | 1953-07-07 | 1954-01-06 | $7700.00 | Window Closed / Lapsed |