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Expired Canadian patentCanada

Processing chamber and step conveyor

CA 1264460 C · Owner: Alkar, A Division Of Dec International, Inc. · Inventors: Buller-Colthurst, Guy Edward

CIPO record

Overview

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

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Abstract From the Canadian patent

A processing chamber for processing products and having different processing conditions in different chamber zones a single continuous conveyor extending through the chamber from one end to the other unit, supports supportable on the conveyor for moving units from one end to the other, a first unit movement system to move units through the chamber at a predetermined first speed a second unit movement system for moving units through the chamber at a predetermined second speed engagement devices interengageable between the unit supports and the first movement system or the second movement system selectively, a control to control the first and second movement system for selective timed …

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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 16, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 18, 1986
GrantedJanuary 16, 1990
Term endedJanuary 16, 2007
Patent numberCA 1264460 C
Classification (IPC)A47J31/00 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedSep 18, 1986Patent grantedJan 16, 1990Term endedJan 16, 2007

Sources & verification

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