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US2808052A
Expired / Lapsed
US
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Traction brace
Assignee: Individual
•
Filing: 1953-03-10
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Granted: 1957-10-01
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Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Luben S Walchef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:34
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE225508C
Cited
US4255A
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US932177A
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GB191513976A
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US1399606A
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US1879001A
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US1939097A
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US2053753A
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US2166229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |