Patent US4689899A successfully refreshed from Google Patents.
US4689899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layered inner sole
Assignee: Individual
•
Filing: 1986-04-21
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Granted: 1987-09-01
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Expires: 2006-04-21
Abstract
Abstract An inner sole for a shoe consisting of a layered construction having a cushioned moisture repellant bottom layer, an insulating middle layer and an overlying moisture absorbent layer which readily evaporates the retained moisture.
Inventors
- 👤 Jon Larson
- 👤 Van Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:35
CPC Classifications
A; A43; A43B; A43B17/00; A43B17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
For insertion into a shoe, an inner sole of layered construction, having in combination a bottom cushion layer repellant to the penetration of moisture, compression resistant insulating central layer of a relatively non-absorbent polyester micro-fibers, and a top layer of a relatively thin non-woven highly porous absorbent non-wicking material which retains foot generated moisture until it is evaporated therefrom.
Claim 2
Dependent Claim
59 words
For insertion into a shoe, an inner sole of layered construction, having in combination a bottom cushion layer repellant to the penetration of moisture, compression resistant insulating central layer of a relatively non-absorbent polyester micro-fibers, and a top layer of a relatively thin non-woven highly porous absorbent non-wicking material which retains foot generated moisture until it is evaporated therefrom.
References Cited (Backward Citations)
BE526240A
Cited
GB534138A
Cited
US4062131A
Cited
US4129675A
Cited
DE3032941A1
Cited
US4461099A
Cited
GB2137866A
Cited
FR2562474A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |