Patent US2616449A successfully refreshed from Google Patents.
US2616449A
Expired / Lapsed
US
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Pilot operated solenoid controlled valve
Assignee: HANNIFIN Corp
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Filing: 1947-12-26
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Granted: 1952-11-04
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Otto J Maha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:49
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/42; F16K31/423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US446406A
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US485046A
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CH71248A
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US1791613A
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US1908504A
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US2110702A
Cited
FR853822A
Cited
US2409517A
Cited
GB586501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |