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Expired Canadian patentCanada

Conveyor with heat transfer arrangement

CA 2485686 C · Owner: Kauppila, Raymond W. · Inventors: Kauppila, Raymond W.; Kauppila, Richard W.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A conveyor for moving hot or cold material along a trough receiving the material. One or more heat transfer fluid flow tubes extend over the outer surface of a trough liner wall to indirectly cause cooling or heating of the liner wall. Fins or angled thin metal strips conductively interconnect the tube or tubes and the liner wall. A series of wear plates are clamped to a pushing side of a helical tube of an auger type conveyor which tube can also , receive a flow of heat transfer fluid. A mass of conductive beads can alternatively be used to transfer heat into or from the heat transfer fluid.

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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

  • Filed April 28, 2003 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2025.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 28, 2003
GrantedJanuary 3, 2012
Term endedApril 28, 2023
Patent numberCA 2485686 C
Classification (IPC)B65G49/00 +2 more

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedApril 28, 2003Patent grantedJan 3, 2012Term endedApril 28, 2023

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.