US2431681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable tension shoe
Assignee: Argus Inc
•
Filing: 1945-06-23
•
Granted: 1947-12-02
•
Expires: 1965-06-23
Abstract
No abstract record available.
Inventors
- 👤 Carl A Barstow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318966A
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US1059067A
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US1350548A
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US1830158A
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US1808252A
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US1941676A
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US1913380A
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US1780945A
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FR691854A
Cited
GB392500A
Cited
US2229454A
Cited
US2373052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |