Patent US2544878A successfully refreshed from Google Patents.
US2544878A
Expired / Lapsed
US
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Heel construction
Assignee: Individual
•
Filing: 1948-09-20
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Granted: 1951-03-13
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Expires: 1968-09-20
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Dratler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:38
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/28; A43B13/34
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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |