Patent US2770811A successfully refreshed from Google Patents.
US2770811A
Expired / Lapsed
US
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Artificial limbs
Assignee: Individual
•
Filing: 1952-04-29
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Granted: 1956-11-20
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Steeper Charles Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:16
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/54; A61F2/58; A61F2/582; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32327; Y10T403/32336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |