Method for enhancing pipes
CA 2006504 C · Owner: Parkes, Adrian Sydney · Inventors: Nixon, Keith; Taylor, John; Ashcroft, Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for replacing an existing service pipe 2 carrying fluid to an outlet within a property with a replacement service pipe 18. In the method the outlet is disconnected within the property from the existing service pipe 2 in such a way that both during and after disconnection fluid is prevented from escaping into the property. A desired length of replacement service pipe 18 is then fed into the existing service pipe 2 in such a way that during and after the feeding step fluid is prevented from escaping into the property. The outlet is then connected to the outlet and of the replacement pipe 2 in such a way that during the connection fluid is prevented from escaping into the …
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 December 22, 1989 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.