Tube for lining pipes and channels, and a method and device for the production thereof
CA 2343111 A1 · Owner: Marquardt, Peter · Inventors: Marquardt, Peter; Rabold, Wolf; Schwert, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a tube (1) for lining pipes (2) and channels and to a method and device for the production thereof. The tube is comprised of a coated woven fabric (3) made of highly elastic warp threads (4) and of weft threads (5) having a lower degree of elasticity. The aim of the invention is to use the inventive tube (1) for lining sharp curves (29) or angles of pipes (2) without the occurrence of creases and in an all-over manner. To this end the highly elastic warp threads (4) are stabilized on straight pipe sections (2) by a cover yarn and, as a result, exhibit a limited degree of longitudinal stretching in this area so that the tube (1) can be placed in the pipe (2) …
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 September 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2021.
- 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.