Patent US2568924A successfully refreshed from Google Patents.
US2568924A
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US
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Pressure delay valve
Assignee: Central Brass & Iron Foundry
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Filing: 1948-08-02
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Granted: 1951-09-25
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Expires: 1968-08-02
Abstract
No abstract record available.
Inventors
- 👤 Edward E Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:35
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/48; F23; F23N; F23N2239/00; F23N2239/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2577; Y10T137/7722; Y10T137/7781; Y10T137/7793
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |