Central space heating apparatus
CA 1312585 C · Owner: South Breeze Corporation · Inventors: Liljegren, Leif; Scanlan, Harry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Central Space Heating Apparatus, Abstract A central space heating apparatus comprises a furnace having a chamber adapted to receive and contain a gas and a source of heat for heating the gas in the chamber, conduits connected in closed circuit to the furnace chamber for conducting the gas from the chamber and returning it to the chamber helium gas, filling the chamber and the conduit circuit under a pressure of from about 25 psig to about 100 psig at the operating temperature of the apparatus a fan for, circulating the helium gas through the conduit circuit and the furnace chamber, and a multiplicity of convectors connected in the conduit circuit for flow of the helium gas therethrough and …
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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
- Granted January 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2010.
- 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.