Patent US2663878A successfully refreshed from Google Patents.
US2663878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sofa bed back rest
Assignee: Individual
•
Filing: 1951-02-16
•
Granted: 1953-12-29
•
Expires: 1971-02-16
Abstract
No abstract record available.
Inventors
- 👤 Harry A Backus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:24
CPC Classifications
A; A47; A47C; A47C17/00; A47C17/04; A47C17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US316901A
Cited
US1222175A
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US1447288A
Cited
US1928405A
Cited
US2006883A
Cited
US2126588A
Cited
US2263328A
Cited
US2368938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |