Fastener
CA 2236972 C · Owner: Acromed Corporation · Inventors: Kapitan, John Mark; Brown, Henry John Harding; Sanders, Marcus Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved fastener is provided for use in retaining vertebrae in a desired spatial relationship. The fastener has a mounting section with a first external thread to engage a vertebra. The fastener has a retaining section with. a second external thread to engage an internal thread on a retaining element, such as a nut. A circular intermediate section interconnects the mounting and retaining sections of the fastener. A plurality of spaced apart recesses are formed in the intermediate section. Each of these recesses has a surface for receiving force to rotate the fastener relative to a vertebra. The circular intermediate section may include an annular end surface which faces toward a …
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 May 7, 1998 and granted April 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2020.
- 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.