Patent US2464400A successfully refreshed from Google Patents.
US2464400A
Expired / Lapsed
US
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Combined line and check valve
Assignee: Airco Inc
•
Filing: 1944-08-22
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Granted: 1949-03-15
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Expires: 1964-08-22
Abstract
No abstract record available.
Inventors
- 👤 Hooper Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:27
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE11473C
Cited
US542126A
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DE511264C
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US930635A
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US1007560A
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US1226040A
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US1437750A
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US1787236A
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US2043798A
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US1939363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |