Replacement of underground pipes
CA 2539515 C · Owner: Tjader, Michael · Inventors: Tjader, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This document discusses, among other things devices, apparatuses, and methods for the replacement of existing underground pipes. In general an apparatus comprises a body, including a receiving portion and a breaking assembly adapted to be positioned within the receiving portion and detachably coupled to the body. In one example the body and the breaking assembly are adapted when coupled, to split the existing underground pipe when pulled therethrough using one or more cutting wheels. In varying examples each cutting wheel radially protrudes out of a breaking assembly housing an increasing amount along a length of the apparatus allowing for a clean progressive cut of the existing pipe. In …
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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 March 14, 2006 and granted August 2, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 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.