Heating apparatus
CA 1284490 C · Owner: Murray, Stuart W. · Inventors: Murray, Stuart W.; Swisher, George W. Jr.; Bracegirdle, Paul E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure This application discloses several, components relating to a heating apparatus which preferably are used in conjuction with each other in an apparatus for heating solid granular or particulate material, such as aggregate used to make asphalt concrete. One component of the present invention includes a heater-condenser unit (32) which indirectly heats the material by circulating heat transfer fluid within hollow plates (240) contained in a housing (232) holding the material. The material is heated, the heat transfer fluid is condensed and a condensate removal means (258, 259, 260) associated with the hollow plates (240) removes the condensate from the housing (232). …
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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 May 28, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2008.
- 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.