Patent US2671224A successfully refreshed from Google Patents.
US2671224A
Expired / Lapsed
US
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Artificial leg
Assignee: Individual
•
Filing: 1951-07-19
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Granted: 1954-03-09
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Expires: 1971-07-19
Abstract
No abstract record available.
Inventors
- 👤 Carl E Regnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/604; A61F2/68; A61F2/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR505919A
Cited
FR530887A
Cited
FR25532E
Cited
US2305291A
Cited
US2490796A
Cited
US2530286A
Cited
US2537351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |