Patent US2755487A successfully refreshed from Google Patents.
US2755487A
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US
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Sofa bed hinge
Assignee: GEN STEEL PRODUCTS Co Inc
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Filing: 1952-10-17
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Granted: 1956-07-24
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 Melvin H Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:30
CPC Classifications
A; A47; A47C; A47C17/00; A47C17/04; A47C17/16; A47C17/17; A47C17/175; A47C17/1756; E; E05; E05D; E05D11/00; E05D11/10; E05D11/1014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |