Patent US2551537A successfully refreshed from Google Patents.
US2551537A
Expired / Lapsed
US
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Linkage for artificial legs
Assignee: Consolidated Vultee Aircraft Corp
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Filing: 1947-09-10
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Granted: 1951-05-01
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Expires: 1967-09-10
Abstract
No abstract record available.
Inventors
- 👤 Glenn G Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/64; A61F2/68; A61F2002/6818
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US842608A
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US1552869A
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GB336757A
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US1934210A
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US1975040A
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US1991796A
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US2357893A
Cited
US2400032A
Cited
US2450728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |