Patent US3570147A successfully refreshed from Google Patents.
US3570147A
Expired / Lapsed
US
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Convertible shoe
Assignee: Individual
•
Filing: 1969-01-15
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Granted: 1971-03-16
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Expires: 1989-01-15
Abstract
Abstract A SHOE CONSTRUCTION CONVERTIBLE FROM A SANDAL-TYPE WHICH DOES NOT INCLUDE A REAR HEEL ENGAGING COMPONENT TO A SHOE HAVING A SLING ENGAGING THE HEEL OF THE WEARER. THE PRESENT INVENTION GENERALLY RELATES TO SHOE STRUCTURES AND MORE PARTICULARLY A SHOE STRUCTURE IN WHICH THE HEEL ENGAGING SLING THEREOF IS READILY REMOVABLY ATTACHED TO THE SHOE TO ENABLE THE SHOE TO BE CONVERTED BETWEEN THE SANDAL-TYPE HAVING NO HEEL ENGAGING COMPONENT AT THE REAR THEREOF AND A SHOE OF CONVENTIONAL CONSTRUCTION INCLUDING A HEEL ENGAGING SLING.
Inventors
- 👤 Winton C Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:03
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/24; A43B3/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |