Orthodontic appliances for dental arch expansion
CA 1284432 C · Owner: Gac International, Inc. · Inventors: Cetlin, Norman M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system of orthodontic applicances and method for their use for gaining space in a dental arch without extraction. Space is gained in the maxillary arch primarily through a transpalatal bar, transmitting force to selected teeth through a maxillary lingual sheath the receiving portion, of the sheath having a mesial offset of about eight degrees. Additional space in the maxillary arch may be gained by employing an extraoral force appliance transmitting force, through a maxillary buccal tube carried on a selected pair of maxillary molars. The mandibular arch is treated by applying similar forces to selected molars through a lip bumper. This appliance transmits force through a mandibular …
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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
- Granted May 28, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2008.
- 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.