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Patent US2711211A successfully refreshed from Google Patents.
US2711211A
Expired / Lapsed
US
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Resiliently mounted back rest
Assignee: Tan Sad Chair Co 1931 Ltd
•
Filing: 1952-04-16
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Granted: 1955-06-21
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Expires: 1972-04-16
Abstract
No abstract record available.
Inventors
- 👤 Tidcombe Edward James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:11
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270081A
Cited
US422225A
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US2424753A
Cited
US1716526A
Cited
US1827928A
Cited
US1980748A
Cited
US2056965A
Cited
US2109697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |