Patent US2447496A successfully refreshed from Google Patents.
US2447496A
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Flux valve system and method of operation
Assignee: Unisys Corp
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Filing: 1944-02-03
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Granted: 1948-08-24
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Expires: 1964-02-03
Abstract
No abstract record available.
Inventors
- 👤 Marlin C Depp
- 👤 Jr Robert S Curry
- 👤 Caesar F Fragola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01C17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1886336A
Cited
US2047609A
Cited
GB451850A
Cited
US2176101A
Cited
US2383460A
Cited
US2383461A
Cited
US2373096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |