Machine and method for providing folded pipe liners
CA 2351235 A1 · Owner: American Pipe & Plastics, Inc. · Inventors: Thompson, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A machine and method for providing a folded liner for insertion into a pipe, comprises an upper section and a lower section. A flattened heated thermoplastic liner is fed downwardly through the upper section to the lower section, where it is redirected and fed substantially horizontally from the lower section. The flattened liner introduced to the upper section is broadly indented at one side of the liner and is then more acutely indented to provide loops disposed side-by-side in a substantially horizontal direction. The lower section reorients the loops so that they are stacked side-by-side in a substantially vertical direction. The liner is cooled as its leaves the lower section to …
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 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2023.
- 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.