Patent US2634087A successfully refreshed from Google Patents.
US2634087A
Expired / Lapsed
US
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Balanced rotary valve assembly
Assignee: I S WARNER
•
Filing: 1947-02-07
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Granted: 1953-04-07
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Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Hess Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:40
CPC Classifications
F; F16; F16K; F16K39/00; F16K39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1571992A
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US1791914A
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US1861747A
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US1966807A
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US2066250A
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US2115383A
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US2124359A
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US2206370A
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US2300835A
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US2493966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |