US2528706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible crutch
Assignee: Individual
•
Filing: 1946-08-13
•
Granted: 1950-11-07
•
Expires: 1966-08-13
Abstract
No abstract record available.
Inventors
- 👤 George E Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H3/0277; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US834205A
Cited
US1630032A
Cited
US1733430A
Cited
US2116730A
Cited
US2373045A
Cited
US2397499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |