Artificial posterior teeth
CA 2109768 C · Owner: Jorgenson, H. Grant · Inventors: Jorgenson, H. Grant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Artificial posterior cuspless teeth possess slightly convex functional occlusal surfaces in both mesiodistal and buccolingual directions on upper posterior teeth and slightly concave functional occlusal surfaces on lower posterior teeth, with both upper and lower posterior teeth configured to conform to the restored curves of Spee in an anterior - posterior direction and to conform to the restored curves of Wilson in a buccolingual direction.
Read the whole patent
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 23, 1993 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2015.
- 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.