Artificial joint, in particular an endoprosthesis, an endoprosthesis for the human knee joint
CA 2124447 A1 · Owner: Nagerl, Hans · Inventors: Kubein-Meesenburg, Dietmar; Nagerl, Hans; Nagerl, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An artificial joint, especially an endoprosthesis for the human knee joint con-sisting of at least two mutually moving joint sections a joint head and a glenoid cav-, ity, with toroidal joint surfaces which have functional surfaces with different circular cutting contours in mutually perpendicular planes - a longitudinal and a transverse plane - whereby the ratio of curvature of the functional surfaces in each of the planes is convex-convex, convex-concave or concave-concave and the mutual jointgeometry of the functional surfaces is determined in each of the two planes by ajoint chain with two joint axes (dimeric joint chain) which run through the centres of rotation of the functional …
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 December 8, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2014.
- 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.