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Expired Canadian patentCanada

Burnished end shirred casing stick, method and apparatus

CA 1333673 C · Owner: Booth, Orville Dwight · Inventors: Booth, Orville Dwight; Evyan, John Joseph

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 shirred stick of cellulosic casing having an open end formed to a desired profile by burnishing. A portion of the surface of the stick bore adjacent the open end is part of the desired profile. The burnishing action forms the stick end to a surface of revolution which is symmetrical about the longitudinal axis of the stick

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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 December 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 4, 1989
GrantedDecember 27, 1994
Term endedDecember 27, 2011
Patent numberCA 1333673 C
Classification (IPC)A22C13/02

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedAug 4, 1989Patent grantedDec 27, 1994Term endedDec 27, 2011

Sources & verification

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