Quadrangular type multi-tube once-through boiler
CA 2006576 C · Owner: Miura, Tamotsu · Inventors: Miura, Tamotsu; Kayahara, Toshihiro; Tai, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A quadrangular type multi-tube once-through boiler having an arrangement in which a feed path for combustion air a combustion, chamber, and an exhaust gas channel passing through a flue are aligned in substantially the same plane, and provided with a burner duct and a blower each installed in any desired regions in outer wall portions defining the width of the boiler body. The boiler body comprises an assembly of a plurality of substantially vertically disposed water tubes so, that combustion gas flows crosswise of the water tubes. A burner is disposed in close adjacency to the first row of water tubes the water tube assembly, whereby even if fuel from the burner is ignited in a space …
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 August 25, 1998. 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.