US2519226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic knee joint for artificial legs or leg braces
Assignee: Individual
•
Filing: 1948-01-12
•
Granted: 1950-08-15
•
Expires: 1968-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas H Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:55
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/64; A61F2/68; A61F2/74; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32541
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1587207A
Cited
US1675760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |