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Expired Canadian patentCanada

Vulcanized rubber footwear product

CA 1260256 A · Owner: La Crosse Footwear, Inc. · Inventors: Barma, Tarachand S.

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

of the Invention, The present invention provides a rubber footwear vulcanizate to which an outsole may be separately affixed. The vulcanizate may be suitably manufactured from an assembly of an uncured rubber upper insole welt and a vulcanized midsole. The inner and outer surfaces of the midsole may be suitably roughened and, the surface thereof which interfaces the uncured assembly may be precoated with an uncured rubber. The assembled uncured rubber footwear components may be vulcanized into a footwear product of unitary construction. The outer midsole surface permits a wide variety of outer soles of different compositions to be separately secured thereto.

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 27, 1985
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260256 A
Classification (IPC)A43B1/10 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedNov 27, 1985Patent grantedSep 26, 1989Term endedSep 26, 2006

Sources & verification

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