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Expired Canadian patentCanada

Device for measuring the adhesion forces in a closure seal for a container and a method of operating this device

CA 1082487 A · Owner: Societe Des Produits Nestle S.A. · Inventors: Hauser, Ivo

CIPO record

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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 device for measuring the adhesion forces in a closure seal of a container, the seal being formed by a membrane adhering to the neck of a container and by a pad retained at the base of the cover of the container adhering together, wherein it comprises a plunger with an adhesive and equipped with lateral guides and disposed in the recess of a shoe of which the sides form inclined planes adapted to the guides of the plunger and of which the base is provided with means for retaining the pad the shoe being connected to a dynamometer.

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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 July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1977
GrantedJuly 29, 1980
Term endedJuly 29, 1997
Patent numberCA 1082487 A
Classification (IPC)G01L1/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedMay 18, 1977Patent grantedJuly 29, 1980Term endedJuly 29, 1997

Sources & verification

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