Plumbing sleeve
CA 2026420 C · Owner: Pollard, Donald Kent · Inventors: Pollard, Donald Kent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe coupling is described suitable for joining together drainage, or other, plastic piping through a poured concrete layer typically a floor. The coupling permits precise location of fittings such as a toilet flange, after the concrete has been poured and set.
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, 1990 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2012.
- 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.