US2505757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High capacity, low inertia check valve for jet propulsion motors
Assignee: Individual
•
Filing: 1945-04-24
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Granted: 1950-05-02
•
Expires: 1965-04-24
Abstract
No abstract record available.
Inventors
- 👤 James Y Dunbar
- 👤 Schubert William
- 👤 Norman R Hussey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:23
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/02; F02K7/06; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/16; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/7888; Y10T137/7891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR412478A
Cited
US1022157A
Cited
US1586226A
Cited
US1983405A
Cited
GB386908A
Cited
DE640228C
Cited
US2199307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |