Expired Canadian patentCanada
Ceramic orthodontic bracket and process for making same
CA 1300178 C · Owner: Tosoh Corporation · Inventors: Haga, Hirotoshi; Tsukuma, Koji; Oda, Seiji
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ceramic orthodontic bracket having an unobtrusive color, is obtained by sintering a molded body of a powdery mixture composed of 2 - 15 mole% of yttrium oxide, 5 - 20 mole% of titanium dioxide and the balance of zirconia.
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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 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 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.
FiledJune 30, 1988
GrantedMay 5, 1992
Term endedMay 5, 2009
Patent numberCA 1300178 C
Classification (IPC)A61C7/00 +2 more
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.