Multiple tube coupling assembly system
CA 2097739 C · Owner: Mcdonald, Sandy · Inventors: Mcdonald, Sandy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a new and improved apparatus for use in attaching a coupling to a tube assembly in which the tube assembly comprises an outer tube made of a first material and at least one inner tube co-axial with and parallel to the outer tube. The inner tube is made of a second material. The coupling comprises at least one tubular extension to receive within it in a close fit a portion of the inner tube and an outside and to engage in close fit over a portion of the outer tube. The apparatus comprises a stationary die which comprises a tube-receiving channel for receiving a part of the outer tube and at least one lower retardant member within the die made of a third material. There is …
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 4, 1993 and granted September 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2015.
- 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.