Low-profile spinal fixation system
CA 2105318 C · Owner: Howland, Robert S. · Inventors: Howland, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a low-profile screw-clamp assembly for use in spinal support fixation systems. The low-profile spinal fixation system comprises an anchor screw, a clamping assembly mounted on the anchor screw and a sleeve nut for attaching the clamping assembly to the anchor screw. The sleeve nut is substantially recessed into the clamping assembly when the anchor screw and clamps are assembled. The present invention also relates to a locking mechanism and method for making such a locking mechanism for locking the sleeve nut in place once assembled which comprises a crimp placed in a wall which forms the recess in the clamping assembly.
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 September 1, 1993 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 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.