US3566487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast shoe
Assignee: Individual
•
Filing: 1969-11-12
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Granted: 1971-03-02
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Expires: 1989-11-12
Abstract
Abstract THIS PATENT DESCRIBES A NOVEL SHOE INTENDED TO BE WORN OVER OR IN CONJUNCTION WITH AN ORTHOPEDIC CAST COMPRISING A FULL, RIGID PLATFORM WHICH IS THICKER AT THE CENTER THAN AT THE HEEL AND TOE TO FORM A CURVED ROCKER-LIKE LOWER SURFACE, A THIN RESILIENT SOLE COVERING SAID LOWER SURFACE, AND A SOFT FLEXIBLE UPPER, SAID UPPER PREFERABLY IS OPENTOED AND HAS TWO SIDE FLAP PORTIONS CONNECTED TO THE SIDES OF SAID PLATFORM AND BEING ADAPTED TO BE SECURED TO EACH OTHER OVER THE ARCH OF THE FOOT, THE INSIDE SURFACE OF SAID PLATFORM CARRYING A LAYER OF RESILIENT MATERIAL.
Inventors
- 👤 Leroy E Beightol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
A; A43; A43B; A43B7/00; A61; A61F; A61F13/00; A61F13/04; A61F13/041; A61F13/043
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |