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Expired Canadian patentCanada

Reciprocating conveyor

CA 1289906 C · Owner: Hallstrom, Olof A. Jr. · Inventors: Hallstrom, Olof A. Jr.

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 reciprocating slat type conveyor comprises a framework mounting a bed of longitudinally extending laterally spaced apart first and second groups of alternating slats arranged for longitudinal sliding movement on the plane of the bed. Interposed between adjacent reciprocating slats is a fixed slat mounted immovably to the framework, each fixed slat having an upper material supporting surface that is narrower than the upper material supporting surface of each first and second reciprocative slat. A pair of double acting hydraulic cylinders are provided to move the groups of reciprocative slats longitudinally, one group of reciprocative slats being connected to one cylinder and the other …

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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 October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 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.
FiledJuly 7, 1989
GrantedOctober 1, 1991
Term endedOctober 1, 2008
Patent numberCA 1289906 C
Classification (IPC)B65G25/04

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJuly 7, 1989Patent grantedOct 1, 1991Term endedOct 1, 2008

Sources & verification

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