US2981312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopedic walking appliance
Assignee: Individual
•
Filing: 1957-05-20
•
Granted: 1961-04-25
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Olle M Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:56
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/04; A61H2003/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1949163A
Cited
US2176551A
Cited
US2314478A
Cited
US2537909A
Cited
US2797874A
Cited
US2847057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |