Patent US2516247A successfully refreshed from Google Patents.
US2516247A
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Nonreturn flow valve
Assignee: SADYE FLORENCE GELB
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Filing: 1949-02-08
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Granted: 1950-07-25
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Expires: 1969-02-08
Abstract
No abstract record available.
Inventors
- 👤 Wallace D Nuenemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:24
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/067; F16K17/00; F16K17/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7853
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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |