Patent DE303958C successfully refreshed from Google Patents.
US4934071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PVC insole with flat bottom and with the top surface made up of hollow humps
Assignee: Alvi - Srl
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Filing: 1988-12-16
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Granted: 1990-06-19
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Expires: 2008-12-16
Abstract
Abstract The instant invention concerns an insole with a flat bottom and with the top surface made up of hollow semispherical or cylindrical humps. Once this insole has been affixed to the sole, whether it be made of PVC foam or polyurethane or wood or any other material, a single piece is formed with a series of completely airtight air tubes.
Inventors
- 👤 Vincenzo Virgini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:47
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/14; A43B7/1405; A43B7/1455; A43B7/146; A43B17/00; A43B17/02; A43B17/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
In combination with the sole of a piece of footwear, a PVC insole with a bottom and a top surface having a plurality of hollow humps formed therein, comprised of: an insole, molded in PVC, on the top surface of which there is a closely packed series of hollow humps, each of the humps being open through the bottom and inside of which air is sealed when the bottom of the insole is directly secured to the sole, so that the sole encloses the humps for sealing the air therein.
Claim 2
Dependent Claim
90 words
In combination with the sole of a piece of footwear, a PVC insole with a bottom and a top surface having a plurality of hollow humps formed therein, comprised of: an insole, molded in PVC, on the top surface of which there is a closely packed series of hollow humps, each of the humps being open through the bottom and inside of which air is sealed when the bottom of the insole is directly secured to the sole, so that the sole encloses the humps for sealing the air therein.
Claim 3
Dependent Claim
14 words
The PVC insole of claim 1, wherein the hollow humps have a semicylindrical shape.
Claim 4
Dependent Claim
14 words
The PVC insole of claim 1, wherein the ;hollow humps have a semispherical shape.
Claim 5
Dependent Claim
14 words
The PVC insole of claim 1, wherein the hollow humps have a semi-elipsoidal shape.
Claim 6
Dependent Claim
54 words
The PVC insole of claim 1, wherein the insole includes a center and an outside edge and further wherein a portion of the hollow humps are positioned transversally and in the center of the insole, surrounded by a perimetral series of the remainder of the humps positioned around the outside edge of the insole.
References Cited (Backward Citations)
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Cited
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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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |