Patent US4823420A successfully refreshed from Google Patents.
US4823420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contour molded insole
Assignee: Individual
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Filing: 1986-12-04
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Granted: 1989-04-25
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Expires: 2006-12-04
Abstract
Abstract A contour molded insole for footwear and method for producing the same to conform to an individual's foot includes at least one layer of material which is provided with plasticity for permitting shaping of the insole. An insole blank is shaped to include an upwardly concave surface portion which, under pressure, is caused to invert to form a convex surface. The insole is provided with a heelbone relief portion and layers of textile and cushioning material for completing a preferred embodiment.
Inventors
- 👤 Hans Bartneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
A; A43; A43B; A43B17/00; A43B17/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
The method of forming an insole for footwear wherein said insole accurately conforms to the bottom contour of an individual's foot, said method comprising the steps of: providing a preform of resilient cushioning material (40) having a heel portion and an arch portion with an upwardly concave portion formed on the underside of said heel portion; providing a layer of moldable material (42) in overlying relation to said preform; imparting plasticity to said layer of moldable material; and forcing said layer of moldable material against the bottom of said individual's foot until said plasticity is diminished.
Claim 2
Independent Claim
96 words
The method of forming an insole for footwear wherein said insole accurately conforms to the bottom contour of an individual's foot, said method comprising the steps of: providing a preform of resilient cushioning material (40) having a heel portion and an arch portion with an upwardly concave portion formed on the underside of said heel portion; providing a layer of moldable material (42) in overlying relation to said preform; imparting plasticity to said layer of moldable material; and forcing said layer of moldable material against the bottom of said individual's foot until said plasticity is diminished.
Claim 3
Dependent Claim
39 words
The method defined in claim 1 including the step of inserting said preform and said layer of moldable material into a piece of footwear prior to the step of forcing said layer of moldable material against said individual's foot.
Claim 4
Dependent Claim
49 words
The method as defined in claim 2 wherein the step of forcing said layer of moldable material includes having said individual stand on said layer and said preform and imparting a force strong enough for inverting said upwardly concave surface into a convex surface in contact with said footware.
References Cited (Backward Citations)
US3825017A
Cited
US3859740A
Cited
US3895405A
Cited
US4520581A
Cited
EP0118319A2
Cited
US4597196A
Cited
US4603493A
Cited
US4654984A
Cited
US4669142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |