Muscular expansion oral shield appliance
CA 2016531 C · Owner: Bergersen, Earl O. · Inventors: Bergersen, Earl O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A muscular expansion oral shield appliance having a buccal shield supported laterally and anteriorly away from the expansion appliance to engage the buccal musculature. The shield may be formed integrally with the appliance or may be mounted thereto in a permanent manner such as by a wire or wires secured to the appliance and the shield or may be mounted thereto in a removable manner such as with a ball and socket type attachment.
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 10, 1990 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2012.
- 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.