System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system
CA 2509079 C · Owner: Roggeband, Serge Mathieu · Inventors: Roggeband, Serge Mathieu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
System for coupling two tubular ends for use in a well bore the system , comprising a first tubular end (4) a second tubular end (1) for inserting into the first tubular end in axial alignment thereof thereby forming an , annular space (31) between the first tubular end and the second tubular end and a connecting assembly (16) for axially coupling the first tubular end with the second tubular end whereby the connecting assembly at least partly reaches in the annular space.
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 December 12, 2003 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 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.