Method and apparatus for installing a pipe liner
CA 2069155 C · Owner: Gargiulo, Joseph L. · Inventors: Gargiulo, Joseph L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for installing a liner in a pipe by reducing the diameter of an elongated tube of lining material, to allow it to be positioned within the pipe, heating the tube of lining material to soften it, and expanding the tube of lining material within the pipe to form a liner includes a plurality of disk-shaped expanders for engaging the tube of lining material from the inside, and expanding the lining material to form a liner, an elongated body member for holding the disk-shaped expander in a spaced apart at least generally parallel orientation, and bypass means for conducting a heated fluid past the disk-shaped expanders from a first end of the apparatus to a second end. A method for …
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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 21, 1992 and granted February 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2014.
- 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.