Patent US2509656A successfully refreshed from Google Patents.
US2509656A
Expired / Lapsed
US
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Valve
Assignee: TWENTICTH CENTURY VALVE CORP I
•
Filing: 1946-09-12
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Granted: 1950-05-30
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Expires: 1966-09-12
Abstract
No abstract record available.
Inventors
- 👤 Tomoser Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:46
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/22; F16K3/24; F16K3/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US549419A
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US1320944A
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GB293730A
Cited
GB439591A
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US2132030A
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US2087185A
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US2217880A
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US2394345A
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US2344657A
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US2415417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |