Patent US2578987A successfully refreshed from Google Patents.
US2578987A
Expired / Lapsed
US
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Vamp lining for safety shoes
Assignee: Endicott Johnson Corp
•
Filing: 1950-08-21
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Granted: 1951-12-18
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward L Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:52
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/32; A43B23/00; A43B23/08; A43B23/081; A43B23/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE18932E
Cited
GB189714422A
Cited
US1638263A
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US1826645A
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US2077121A
Cited
US2130794A
Cited
US2328601A
Cited
US2292297A
Cited
US2394216A
Cited
US2457463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |