Liquid cooled boiler door
CA 2062405 C · Owner: Saskatoon Boiler Mfg. Co. Ltd. · Inventors: Joffrion, Eric J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid-cooled boiler door for use with a boiler having a flooded liquid section and a storage liquid section. The liquid-cooled boiler door includes an interior wall having an interior surface and an exterior surface and an exterior wall having an interior surface and an exterior surface. The exterior wall is spaced from said interior wall to define a circulation space therebetween. A first connector fluidly connects the flooded liquid section of the boiler to the circulation space defined between the interior wall and the exterior wall of the liquid-cooled boiler door. A second connector fluidly connects the storage liquid section of the boiler to the circulation space defined between …
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 March 5, 1992 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.