Locking device for telescopic rods
CA 2199447 C · Owner: Longo, Renato · Inventors: Longo, Renato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reversible expansion locking element for selectively securing two tubes or rods, in telescoping relationship with respect to one another wherein the element has, oppositely oriented outwardly expandable conical threaded portions separated by a central protrusion. The expansion element is receivable within a first hollow, tube and is adapted to receive a threaded end of the other tube or rod.
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 7, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2019.
- 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.