Shaped foot support for shoes
CA 1106595 A · Owner: Freudenberg, Carl · Inventors: Krug, Hans-Dietrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shaped foot support for shoes to be included in the shoe during manufacture or introduced into the shoe after manufacture consisting of a closed-cell cross-linked foam polyolefin, piece having a surface structure adapted to the human foot with zones of different elasticities distributed over the surface merging smoothly into one another. The foam polyolefin has low elasticity in regions of relatively high orthopaedic loading with lower elasticity in regions of comparatively lower loading. The density of the polyolefin which varies inversely as the elasticity is within the range of 0.07 to l kg/dm3 and an insole,suitably of a fibrous material of natural or synthetic fibres bonded …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.