All-terrain footwear with retractable spikes
CA 2345425 A1 · Owner: Sawtelle, Joyce V. · Inventors: Sawtelle, Joyce V.; Violette, Richard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article of footwear includes a sole having a cavity formed therein and a plurality of holes, extending from the cavity to the bottom surface of the sole. A spike is disposed in each one of the, holes, and each spike is translatable between an extended position wherein a first end of the spike, protrudes from the bottom surface of the sole and a retracted position wherein the first end does not, protrude from the bottom surface of the sole. A slide member is slidably disposed in the cavity and, has a plurality of recesses formed in a first surface thereof which is oriented towards the spikes. The, slide member is translatable in a lengthwise direction between a first position …
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 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2023.
- 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.