US3972135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platform for footwear and article of footwear
Assignee: Uniroyal Inc
•
Filing: 1975-05-22
•
Granted: 1976-08-03
•
Expires: 1995-05-22
Abstract
Abstract A platform for footwear utilizing a rigid or semi-rigid body of polyurethane foam having a layer of fabric integral with the body and forming the upper surface of the platform. The polyurethane body also has a layer of fabric integral therewith and forming the lower surface of the platform. The platform does not crack or crumble under repeated flexings in the stressed ball-of-the-foot area.
Inventors
- 👤 Thaddeus Pietraszek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/37; A43B13/02; A43B13/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A platform for footwear comprising: a body of polyurethane foam having a compression modulus in the range of 150 to 400 pounds per square inch; a first layer of fabric integral with said body over the entire surface of said first fabric layer and forming the upper surface of the platform; and a second layer of fabric integral with said body over the entire surface of said second fabric layer and forming the lower surface of the platform.
Claim 2
Dependent Claim
78 words
A platform for footwear comprising: a body of polyurethane foam having a compression modulus in the range of 150 to 400 pounds per square inch; a first layer of fabric integral with said body over the entire surface of said first fabric layer and forming the upper surface of the platform; and a second layer of fabric integral with said body over the entire surface of said second fabric layer and forming the lower surface of the platform.
Claim 3
Dependent Claim
25 words
A platform in accordance with claim 1 in which said body has a density in the range of 5 to 30 pounds per cubic foot.
Claim 4
Dependent Claim
16 words
A platform in accordance with claim 1 in which said layers of fabric are textile material.
Claim 5
Dependent Claim
16 words
A platform in accordance with claim 1 in which said layers of fabric are woven material.
Claim 6
Dependent Claim
94 words
An article of footwear comprising: a platform comprising a body of polyurethane foam having a compression modulus in the range of 150 to 400 pounds per square inch, a first layer of fabric integral with said body over the entire surface of said first fabric layer and forming the upper surface of said platform, and a second layer of fabric integral with said body over the entire surface of said second fabric layer and forming the lower surface of said platform; an upper attached to said platform; and a sole attached to said platform.
Claim 7
Dependent Claim
94 words
An article of footwear comprising: a platform comprising a body of polyurethane foam having a compression modulus in the range of 150 to 400 pounds per square inch, a first layer of fabric integral with said body over the entire surface of said first fabric layer and forming the upper surface of said platform, and a second layer of fabric integral with said body over the entire surface of said second fabric layer and forming the lower surface of said platform; an upper attached to said platform; and a sole attached to said platform.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |