Device which is expandable to engage the interior of a tube
CA 2545565 C · Owner: Mcgarian, Bruce · Inventors: Laplante, Tony; Pape, Gary; Mcgarian, Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device which is expandable to engage the interior of a tube for example the casing of an oil well, comprises first and second (3) tubular members in partial telescopic engagement with each other the first tubular member having an end region which is received on the second tubular member and which is expandable radially outwardly to engage the interior of the tube. The second tubular member (3) has tapered regions (12,13,14,15) which when forced into the end region, will cause radial expansion of the end region. The taper angle of the second tapered zone (13) is less than the taper angle of both the first tapered zone (12) and the third tapered zone (14). The fourth tapered zone (15) …
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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 1, 2006 and granted March 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 1, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.