Patent US2707477A successfully refreshed from Google Patents.
US2707477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Walking crutch
Assignee: Individual
•
Filing: 1950-04-24
•
Granted: 1955-05-03
•
Expires: 1970-04-24
Abstract
No abstract record available.
Inventors
- 👤 Chapin Gerald Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:34
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB117737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |