Shoe insole
US6021587A · kind A · utility
1Cited by
8References
3Claims
0Family size
Inventor
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A shoe insole is composed of a toe portion, a sole portion and a heel portion. The insole has a thickness of 2 mm or more. The toe portion and the sole portion have a hardness value ranging between 20 and 45 degrees in the Asker Type C, whereas the heel portion has a hardness value ranging between 30 and 50 degrees in the Asker Type C. The hardness values of the toe portion, the sole portion and the heel portion are decreased by at least 5 degrees for an increase in the thickness of the insole by 1 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.