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Expired Canadian patentCanada

Automatic slurry concentration control system

CA 1206953 A · Owner: Hitachi, Ltd. · Inventors: Kamino, Yukishige; Sakamoto, Masakatsu; Saito, Makoto

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

An automatic slurry concentration control system including a mixing tank filled with a charge of slurry of solids containing water, a clear water tank for supplying clear water, a suction tube of a slurry supply pump located in an opening in a lower portion of the mixing tank, and a movable tube for adjusting the opening of the mixing tank, wherein the concentration of slurry in the suction tube can be controlled by adjusting the movable tube, is provided with a clear water control device. The clear water control device is mounted in the clear water tank for controlling the amount of clear water supplied from the clear water tank in accordance with the amount of slurry delivered from the …

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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 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 18, 1983
GrantedJuly 2, 1986
Term endedJuly 2, 2003
Patent numberCA 1206953 A
Classification (IPC)B28C7/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJan 18, 1983Patent grantedJuly 2, 1986Term endedJuly 2, 2003

Sources & verification

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