Tube
CA 2124089 C · Owner: Andersson, Thomas · Inventors: Andersson, Thomas; Ageheim, Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tube of layered material having at least a main layer and a barrier layer for use in transporting and storage of hydrocarbons such as petrol, kerosene, diesel oil fuel oil, natural gas, LPG and , other similar hydrocarbons which show similar chemical, and physical properties as the properties of diffusion through plastic materials, in which tube the main layer essentially comprises polyethene or polypropene, e.g. MD-polyethene and the barrier layer comprises polyethene or polypropene, e.g. HD-polyethene in combination with any of the following components butyl rubber, polyamide , and polyester.
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 November 23, 1992 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 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.