Barrier tubing
CA 2458728 A1 · Owner: Stevens, Kenneth Earl · Inventors: Stevens, Kenneth Earl; Bergevin, Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Plastic tube fluid handling means provided in the form of one or more polymeric tubes (12) embedded in foil laminate (14) which includes metal (16) and at least one polymer. The preferred polymers are polyolefins and polyamides. The metal (16) provides barrier protection making the structure suitable for use in fuel lines, refrigerator hose in-floor heating pipe, solar hot water heating systems and the like. The tubes are of a geometry which provides burst strength, so that the metal can be quite thin.
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 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2024.
- 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.