US2771089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crutch
Assignee: Individual
•
Filing: 1954-01-14
•
Granted: 1956-11-20
•
Expires: 1974-01-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Magida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H2003/001; A61H2003/0216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB135275A
Cited
US1063846A
Cited
GB122694A
Cited
US1505081A
Cited
US2223911A
Cited
US2642074A
Cited
US2656874A
Cited
US2738830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |