Patent US2447683A successfully refreshed from Google Patents.
US2447683A
Expired / Lapsed
US
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Sofa bed hinge
Assignee: Signal Manufacturing Co
•
Filing: 1944-12-11
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Granted: 1948-08-24
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Expires: 1964-12-11
Abstract
No abstract record available.
Inventors
- 👤 Boiu Maximilian Reu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:51
CPC Classifications
A; A47; A47C; A47C17/00; A47C17/04; A47C17/16; A47C17/17; A47C17/175; A47C17/1756
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US833903A
Cited
US1140852A
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US2224825A
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US2334493A
Cited
US2317105A
Cited
US2343642A
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 |