Device for joining of pipelines
CA 1286336 C · Owner: Vingerhagen, Arne · Inventors: Killerud, Kai; Vingerhagen, Arne; Bratseth, Audun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for joining of pipelines for transportation of fluids allowing pigs to pass the coupling undisturbed. The diameter of the conduit in the middle portion (II) of the coupling is larger than the nominal internal diameter of the pipelines.
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
- Granted July 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2008.
- 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.