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Expired Canadian patentCanada

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CA 1318893 C · Owner: Calvert, Rodney K. · Inventors: Calvert, Rodney K.; Oliff, James R.

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 carton for packaging a plurality of cylindrical articles includes top, bottom and side walls foldably joined to form an end loading tubular structure as well as end, closure flaps foldably joined to each end edge of the top and side walls together with a bottom end closure flap adjoined to each end edge of the bottom wall of the carton by an upwardly and outwardly inclined bevel strip disposed alongside inwardly and downwardly inclined beveled circular connecting structure forming the lower rim portion of the packaged items thereby to eliminate square corners at the ends of the bottom of the carton and a resulting tendency of the end walls of the carton to bow outwardly when stacked in …

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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 June 8, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 8, 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.
FiledSeptember 12, 1988
GrantedJune 8, 1993
Term endedJune 8, 2010
Patent numberCA 1318893 C
Classification (IPC)B65D71/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedSep 12, 1988Patent grantedJune 8, 1993Term endedJune 8, 2010

Sources & verification

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