Dispersed-air footpad
CA 2396400 A1 · Owner: Legatzke, David K. · Inventors: Legatzke, David K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For use in a sole, insole, or heel portion of a footwear article a footpad , (10) is described, having an upper surface on which are disposed a plurality of resilient lugs (30). The top surfaces (32) of the lugs (30) define a foot supporting surface wherein mutually parallel spaced-apart edges of the , adjacent lugs define a complementary arrangement of top surfaces. The side surfaces (34) of adjacent lugs (30) expand into the void and retreat , therefrom, cyclically expelling and ingesting air beneath the foot. With heavy compression, the top surfaces (32) of adjacent lugs (30) are approximated to one another to provide a substantially continuous and substantially uniformly …
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
- Filed April 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2022.
- 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.