US2439753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: CHARLOTTE L REAVIS
•
Filing: 1945-02-03
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Granted: 1948-04-13
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Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:03
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/38; H; H01; H01H; H01H36/00; H01H36/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1602502A
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US1882614A
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US2062674A
Cited
US2110704A
Cited
US2204161A
Cited
US2184605A
Cited
US2292648A
Cited
US2307304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |