Patent US4224748A successfully refreshed from Google Patents.
US4224748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe sole
Assignee: Meramec Industries Inc
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Filing: 1979-03-23
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Granted: 1980-09-30
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Expires: 1999-03-23
Abstract
Abstract The invention relates to an injection molded, raised heel, shoe sole structure of improved strength characteristics. The shoe sole consists of (i) a unitary shoe sole member comprising a raised heel, a foot supporting member and a shank portion connecting the heel and the foot supporting member; (ii) a toplift member positioned on the terminal portion of the raised heel of the sole member; and (iii) a free-standing metallic support member embedded within the full length of the heel and a portion of the shank portion of the sole member. The toplift member is attached to and supported by a free end of the metallic support member.
Inventors
- 👤 Raymond Whitchurch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/22; A43B13/00; A43B13/37
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A raised heel, shoe sole structure comprising: (a) a unitary sole member formed from a synthetic organic polymer and comprising a raised heel, a generally horizontally disposed foot supporting member and a shank portion connecting said heel and foot supporting member; (b) a toplift member positioned on the terminal portion of the heel of said sole member; and (c) a unitary, free-standing metallic support member having a cross-sectional area varying from about 0.004 to about 0.04 square inches embedded within the full length of the heel of said sole member and for at least about 50% of the length of the shank portion of the sole member, said toplift member attached to and supported by a free end of said metallic support member.
Claim 2
Dependent Claim
123 words
A raised heel, shoe sole structure comprising: (a) a unitary sole member formed from a synthetic organic polymer and comprising a raised heel, a generally horizontally disposed foot supporting member and a shank portion connecting said heel and foot supporting member; (b) a toplift member positioned on the terminal portion of the heel of said sole member; and (c) a unitary, free-standing metallic support member having a cross-sectional area varying from about 0.004 to about 0.04 square inches embedded within the full length of the heel of said sole member and for at least about 50% of the length of the shank portion of the sole member, said toplift member attached to and supported by a free end of said metallic support member.
Claim 3
Dependent Claim
25 words
The article of claim 1 wherein said toplift member is formed from a thermoplastic polyurethane having a Shore A hardness of at least about 85.
Claim 4
Dependent Claim
15 words
The article of claim 2 wherein said metallic support member is formed from spring steel.
References Cited (Backward Citations)
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Cited
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US2729618A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |