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Expired Canadian patentCanada

Improved sugarless non-tack chewing gum

CA 2183148 C · Owner: Wm. Wrigley Jr. Company · Inventors: Dzija, Michael R.; Richey, Lindell C.

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 sugarless non-tack chewing gum having excellent cohesive properties and flavor is prepared using a non-tack gum base which is typically less cohesive or even crumbly. The lack of cohesiveness in the gum base is overcome by adding, to the chewing gum a syrup blend including glycerin with evaporated hydrogenated starch hydrolysates and water. The syrup blend is preferably prepared by coevaporating a mixture of glycerin with a conventional aqueous hydrogenated starch hydrolysate solution, ln order to remove much of the water. The syrup blend acts as a binder for the gum base and chewing gum ingredients without causing the gum to adhere to teeth and dentures.

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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

  • Filed December 18, 1995 and granted December 8, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 18, 1995
GrantedDecember 8, 1998
Term endedDecember 18, 2015
Patent numberCA 2183148 C
Classification (IPC)A23G4/00

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedDec 18, 1995Patent grantedDec 8, 1998Term endedDec 18, 2015

Sources & verification

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