Foot warming heating element and method of manufacturing a foot warming heating element
CA 2468331 A1 · Owner: Kimura, Hisao · Inventors: Sakamaki, Yoshikazu; Aida, Michio; Dodo, Toshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foot warming heating element capable of preventing a heating composition from moving by fixing a part or all of the composition in a packaging material by using the shape maintainable heating composition and capable being suitably fitted to the shape of a foot at the time of installation to efficiently warm the specified portions of the foot for a long time irrespective of an air pressure in a storage bag when the heating element is used by sticking on the foot, footware, and socks, characterized in that a heating formed product causing heating reaction under the presence of air and having a shape maintaining degree of 70 or higher is sealed in the storage bag formed of a …
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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 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2025.
- 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.