Physiological dental securing peg of composite material and method of manufacture thereof
CA 2068877 C · Owner: Reynaud, Pierre-Luc · Inventors: Duret, Bernard; Duret, Francois; Reynaud, Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A post-core restoration apparatus consists of a physiological dental anchoring post (1) made of composite material and a crown restoration material (3) placed between the post (1) and the healthy dentin walls (2a) the post (1) being made of high resistance fibres (5) embedded in resin (4). To improve the physical behaviour of the post its fibres are extended in the axial direction of the post (1) are continuous from one end to the other and under equal tension giving the post mechanical characteristics similar to dentin with respect to the modulus of cross elasticity and superior to dentin with respect to resistance to compression-traction in the longitudinal direction and resistance to …
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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
- Filed November 20, 1990 and granted February 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 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.