Patent US3500561A successfully refreshed from Google Patents.
US3500561A
Expired / Lapsed
US
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Shoe,especially shoe for aiding children in learning to walk
Assignee: SALAMANDER AG
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Filing: 1967-10-19
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Granted: 1970-03-17
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Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Roland O Epstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:34
CPC Classifications
A; A43; A43B; A43B9/00; A43B23/00; A43B23/08; A43B3/00; A43B3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE6586C
Cited
US2244504A
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US2385743A
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US2435051A
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US2471696A
Cited
FR1185523A
Cited
US3075305A
Cited
US3333353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |