US2499382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow controlling device
Assignee: PAUL A DEWHIRST
•
Filing: 1946-04-23
•
Granted: 1950-03-07
•
Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 Leland S Hamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:47
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/312; Y; Y10; Y10T; Y10T137/00; Y10T137/8376; Y10T137/8593; Y10T137/86493; Y10T137/87169; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US485409A
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US786393A
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US1226380A
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US1613138A
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US1842056A
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US1981825A
Cited
US2042067A
Cited
US2151596A
Cited
US2203989A
Cited
US2339970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |