Dual outside diameter cannula for insertion into bone
CA 2489811 A1 · Owner: Sdgi Holdings, Inc. · Inventors: Lim, Roy K.; Sherman, Michael C.; Schofield, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cannula and a method of inserting the cannula into a bone within a patient. The cannula comprises a distal section a proximal section, and an , intermediate section positioned therebetween. The distal section has a smaller diameter than the proximal section. The smaller diameter assists in inserting the distal section into the bone. The increased diameter of the proximal section gives rigidity and strength to prevent bending or flexing during insertion. The proximal section has a wall thickness greater than the distal section to give rigidity and strength to the cannula.
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 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2025.
- 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.