US2672922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable back rest
Assignee: Individual
•
Filing: 1952-11-14
•
Granted: 1954-03-23
•
Expires: 1972-11-14
Abstract
No abstract record available.
Inventors
- 👤 George W Freund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:23
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/16; B; B63; B63B; B63B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1279229A
Cited
US1511704A
Cited
US1749491A
Cited
US1852012A
Cited
US1980748A
Cited
US2152014A
Cited
US2508769A
Cited
US2642124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |