Patent US2638928A successfully refreshed from Google Patents.
US2638928A
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US
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Automatic valve control means responsive to failure of either of two sources of fluid pressure
Assignee: Eclipse Fuel Engineering Co
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Filing: 1947-09-27
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Granted: 1953-05-19
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Expires: 1967-09-27
Abstract
No abstract record available.
Inventors
- 👤 Stadler Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; F23; F23N; F23N5/00; F23N5/24; F23N5/247; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2703; Y10T137/2705; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/773
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE100633C
Cited
US1303801A
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US1851924A
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US1299850A
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FR571635A
Cited
US1717692A
Cited
GB282642A
Cited
US2081542A
Cited
US2327055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |