US2780879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stiffening of shoe uppers and stiffening elements therefor
Assignee: Stedfast Rubber Co Inc
•
Filing: 1953-11-16
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Granted: 1957-02-12
•
Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Raymond B Harrison
- 👤 Russell G Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:37
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/08; A43B23/081; A43B23/086; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2646379A
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US2611195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |