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Expired Canadian patentCanada

Deciduous dentition treatment appliance and orthodontic method for the very young child

CA 1300933 C · Owner: Ortho-Tain, Inc. · Inventors: Bergersen, Earl O.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method and an orthodontic positioner for preventing or correcting overbite and/or overjet at a deciduous dentition stage wherein a patient has only deciduous teeth is provided. A positioner having depressions or slots sized for permanent teeth but receiving deciduous teeth will assist in shaping the jaw to provide early correction of detention problems.

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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 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 25, 1988
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1300933 C
Classification (IPC)A61C7/00 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 25, 1988Patent grantedMay 19, 1992Term endedMay 19, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.