US2960095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible cane-crutch
Assignee: Individual
•
Filing: 1957-02-13
•
Granted: 1960-11-15
•
Expires: 1977-02-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A45; A45B; A45B3/00; F; F16; F16B; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16B2/241; F16B2/245; F16B2/246; A61H2003/0233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1361733A
Cited
US1400394A
Cited
US1520569A
Cited
US2429409A
Cited
US2388778A
Cited
US2590607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |