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Expired Canadian patentCanada

Granulation chamber for extruders of materials such as plastics

CA 1307084 C · Owner: Sabbioni, Giuseppina · Inventors: Sabbioni, Giuseppina

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

Reduced-size granulation chamber for extruders of materials such as plastics, constituted by a rotating drum wherein the cooling water remains adherent to the walls due to the centrifugal force and which has openings for the exit of the water and of the granules and is inserted in a basket which is in turn inserted in a container both being fixed, and separating the water from the granules the granules, being thrust by inclined fins arranged outside the drum in the chamber defined between the drum and the basket while the water falls by gravity into the second chamber defined between the basket and the fixed chamber.

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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 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 2009.
  • 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 7, 1988
GrantedSeptember 8, 1992
Term endedSeptember 8, 2009
Patent numberCA 1307084 C
Classification (IPC)B29B9/16 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedSep 7, 1988Patent grantedSep 8, 1992Term endedSep 8, 2009

Sources & verification

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