Patent US4445284A successfully refreshed from Google Patents.
US4445284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Footwear with integral cushioning and ventilating apparatus
Assignee: Individual
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Filing: 1982-02-18
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Granted: 1984-05-01
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Expires: 2002-02-18
Abstract
Abstract A shoe which comprises an upper and a sole having a plurality of elongated chambers disposed therein and have fluid communication between the top face of the sole and the ambient surrounding the shoe.
Inventors
- 👤 Eric M. Sakutori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:46
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/06; A43B7/08; A43B7/081
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A shoe which comprises: an upper; a sole having a plurality of elongated chambers disposed therein, said sole having a plurality of slits extending along the top face thereof, each chamber communicating with at least one of said slits and the ambient surrounding the shoe; a first check valve disposed in each of said elongated chambers to limit the direction of flow in the elongated chamber in which it is disposed to a first direction, said first check valve in each elongated chamber is disposed at a first axial extremity of the elongated chambers and said first check valve allows air to pass into the associated elongated chamber and prevents reverse flow out through said check valve; and a second check valve in each of said elongated chambers substantially at a second axial extremity thereof and which is oriented to allow fluid flow in a direction which is opposite to said first direction.
Claim 2
Dependent Claim
153 words
A shoe which comprises: an upper; a sole having a plurality of elongated chambers disposed therein, said sole having a plurality of slits extending along the top face thereof, each chamber communicating with at least one of said slits and the ambient surrounding the shoe; a first check valve disposed in each of said elongated chambers to limit the direction of flow in the elongated chamber in which it is disposed to a first direction, said first check valve in each elongated chamber is disposed at a first axial extremity of the elongated chambers and said first check valve allows air to pass into the associated elongated chamber and prevents reverse flow out through said check valve; and a second check valve in each of said elongated chambers substantially at a second axial extremity thereof and which is oriented to allow fluid flow in a direction which is opposite to said first direction.
Claim 3
Dependent Claim
106 words
A shoe which comprises: an upper; a sole having a plurality of elongated chambers disposed therein, each chamber communicating with at least the top face of the sole and the ambient surrounding the shoe; a first check valve disposed substantially at the first axial extremity of each of said elongated chambers to limit the direction of flow in the elongated chamber in which it is disposed to a first direction; and a second check valve in each of said elongated chambers substantially at a second axial extremity of and which is oriented to allow fluid flow in a direction which is opposite to said first direction.
Claim 4
Dependent Claim
106 words
A shoe which comprises: an upper; a sole having a plurality of elongated chambers disposed therein, each chamber communicating with at least the top face of the sole and the ambient surrounding the shoe; a first check valve disposed substantially at the first axial extremity of each of said elongated chambers to limit the direction of flow in the elongated chamber in which it is disposed to a first direction; and a second check valve in each of said elongated chambers substantially at a second axial extremity of and which is oriented to allow fluid flow in a direction which is opposite to said first direction.
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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |