Oral appliance suitable for use as sports guard
CA 2428601 C · Owner: Farrell, Christopher John · Inventors: Farrell, Christopher John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sports guard for fitting over the upper arch and teeth of a user is disclosed. The sports guard comprises broadly a base member of polyethylene and a layer of EVA encasing the polyethylene. The polyethylene and EVA show a surprising and unexpected affinity for each other. They are able to flex with each other and be heated and cooled without delaminating. This provides a solution to a longstanding problem in this art.
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 May 13, 2003 and granted April 26, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.