A heating appliance
CA 2453226 A1 · Owner: Microgen Energy Limited · Inventors: Clark, David Anthony; Lowrie, James Robert; Allderidge, Heather
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A domestic combined heat and power system comprising a Stirling engine (1) and water heater in the form of a supplementary burner (17). The exhaust gas from the Stirling engine is used to preheat combustible gas entering the Stirling engine and subsequently used to heat the water. The water heater (15) has a helical water duct (41) towards the periphery of a housing (39). Separate parts of this duct are heated, in series by the exhaust gas from the Stirling , engine and the supplementary burner (17) firing radially outwardly through the helical duct.
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 18, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2024.
- 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.