Shoe insole
US4642912A · kind A · utility
41Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | May 2, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A shoe insole having superior cushioning and comfort, good resistance to buckling, and excellent retention of cushioning properties after wear. The insole consists of three layers: PA0 (a) a bottom layer having compressive strength of at least 0.3 kg/cm.sup.2 at 40% strain, PA0 (b) an intermediate layer having less compressive strength at 40% strain than the bottom layer, and PA0 (c) a top layer constructed of fabric. The three layers are laminated together and shaped to fit inside of an article of footwear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.