US3844056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe anti-slip device
Assignee: Lee Raymond Organization Inc
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Filing: 1973-09-04
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Granted: 1974-10-29
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Expires: 1993-09-04
Abstract
Abstract A pointed metal cap that screws into a female thread in the bottom of the heel of a conventional shoe. The points of the metal cap may be adjusted, to protrude a desired distance beyond the heel of the shoe on which it is attached, for the purpose of increasing traction between the heel of a shoe and a slippery surface such as ice or snow.
Inventors
- 👤 J Kwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:36
CPC Classifications
A; A43; A43C; A43C13/00; A43C13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
An anti-slip device in the form of a male threaded cap, together with a female threaded housing in the form of a sleeve which threadably engages the cap, said housing being mounted in a recess in the bottom of a sole or heel of a shoe, in which one end face of the cap is fitted with sharp points, WITH SLOTS FORMED IN THE FACE OF ONE END OF THE CAP AND EXTENDING INTO THE THREADED SECTION OF THE CAP SO AS TO EXTEND THE PITCH DIAMETER OF THE THREADED SECTION OF THE CAP TO PROVIDE A TIGHT FIT BETWEEN THE EXPANDED THREADS OF THE CAP AND THE THREADS OF THE SLEEVE HOUSING WHICH PREVENTS INADVERTENT ROTATION OF THE CAP WITH RESPECT TO THE HOUSING WHEN THE CAP IS ROTATED IN THREADED ENGAGEMENT WITH THE HOUSING TO PROJECT A VARIABLE DESIRED AMOUNT OF THE CAP BEYOND THE SURFACE OF AN ATTACHED SHOE.
Claim 2
Dependent Claim
152 words
An anti-slip device in the form of a male threaded cap, together with a female threaded housing in the form of a sleeve which threadably engages the cap, said housing being mounted in a recess in the bottom of a sole or heel of a shoe, in which one end face of the cap is fitted with sharp points, WITH SLOTS FORMED IN THE FACE OF ONE END OF THE CAP AND EXTENDING INTO THE THREADED SECTION OF THE CAP SO AS TO EXTEND THE PITCH DIAMETER OF THE THREADED SECTION OF THE CAP TO PROVIDE A TIGHT FIT BETWEEN THE EXPANDED THREADS OF THE CAP AND THE THREADS OF THE SLEEVE HOUSING WHICH PREVENTS INADVERTENT ROTATION OF THE CAP WITH RESPECT TO THE HOUSING WHEN THE CAP IS ROTATED IN THREADED ENGAGEMENT WITH THE HOUSING TO PROJECT A VARIABLE DESIRED AMOUNT OF THE CAP BEYOND THE SURFACE OF AN ATTACHED SHOE.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |