US2756809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back support for chairs, car seats, and the like
Assignee: Individual
•
Filing: 1954-06-30
•
Granted: 1956-07-31
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Endresen Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:46
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/70; B60N2/7023; B60N2/7029; A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189902598A
Cited
US958356A
Cited
US1264265A
Cited
US1677584A
Cited
US1937920A
Cited
US2359318A
Cited
US2549902A
Cited
US2550831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |