Dental composition, prostheses, and method for making dental prostheses
CA 2124426 C · Owner: Tateosian, Louis H. · Inventors: Tateosian, Louis H.; Shaffer, Scott E.; Latta, Mark A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dental prosthesis includes polymeric material formed by heat curing a polymerizable composition having at least 5 percent by weight of at least one polymerizable Monomer having at least one acrylic moiety and a gram molecular weight of at least 200. The polymeric material is preferably formed by heat curing and has an unnotched izod impact strength of at least 2.5 and more preferably at least 3.0 ft.cndot. lb/in as measured by a Modified ASTM D256 and a flexural fatigue life of at least 20,000 flexes to failure at 0.1 inch deflection. Preferably the polymerizable monomer has a vapor pressure less than 5 mm Hg at 23°C. A method of making a denture is provided which includes molding and …
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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 May 26, 1994 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2016.
- 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.