Cementless acetabular cup
CA 2098428 A1 · Owner: Evans, David Lee · Inventors: Evans, David Lee; Stegemann, Peter Edward; Enzerink, Robert-Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A prosthetic joint acetabular cup component is provided that can be press fit into a patient's acetabulum, to create an interference fit and to eliminate the need for cement. A body portion of the cup provides an outer convex surface. The inside of the cup provides an inner concave surface. An apex portion of the cup or shell is spaced from the lower rim portion, the lower rim defining a plane. A plurality of annular rings are spaced along the body outer surface beginning at the lower rim and extending at least a partial distance toward the apex. Each of the annular rings is preferably generally parallel to the plane of the lower rim.
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 June 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.