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Expired Canadian patentCanada

Paper-making material deposition apparatus

CA 1324908 C · Owner: Yamazaki, Tokushichi · Inventors: Yamazaki, Tokushichi

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 paper-making material deposition apparatus includes a tower having a paper-making material inlet provided at the center of the top thereof for depositing a paper-making material in the inside thereof a stirrer, rotatable in a substantially horizontal plane in and adjacent to the bottom of the tower and having dilutingwater jet nozzles and diluting-water supply passages leading to the jet nozzles, and a driver disposed beneath the tower bottom for rotating a shaft depending integrally from the stirrer and penetrating the center of the tower bottom.

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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 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 2010.
  • 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 15, 1988
GrantedDecember 7, 1993
Term endedDecember 7, 2010
Patent numberCA 1324908 C
Classification (IPC)D21D5/28

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 15, 1988Patent grantedDec 7, 1993Term endedDec 7, 2010

Sources & verification

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