Torsional tightener for bone anchoring or implant element/tools
CA 2037807 C · Owner: Nobelpharma Ab · Inventors: Carlsson, Lennart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A torsional tightener system for anchoring elements or tools in bone or dentine or in implants anchored in bone or dentine sufficiently compact to be inserted into the mouth includes an electric motor with a small rotating mass operating at high speed, powered by an energy supply circuit and imparting a, high level of torque with a high degree of sensitivity over a small range; means for controlling the speed of the motor; means for selecting an operating range of speeds and torques; a torsional tightening part actuated by the motor and cooperating with the element or tool; an energy supply varying the energy supplied to the motor; means for releasing the torsional tightener at a preset …
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 March 8, 1991 and granted November 12, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2013.
- 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.