Internally tin-coated copper pipe and method for coating a copper pipe
CA 2225464 C · Owner: Reiter, Ullrich · Inventors: Reiter, Ullrich; Baukloh, Achim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A copper installation pipe having a tin coating that is applied with temperature control so as to be adherent over the entire inner surface. The thickness of the intermetallic phase formed at the transition from the copper pipe to the tin coating is less than 20% preferably, less than 5% of the overall coating thickness. In addition, a method for coating an installation pipe using chemical treatment, where the temperature of the tinning solution is selectively varied. To ensure the smallest possible intermetallic phase at the copper surface one, begins the tinning process at a low temperature. This promotes the formation of a large number of uniformly distributed nuclei of crystallization …
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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 19, 1997 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2019.
- 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.