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Expired Canadian patentCanada

Detergent dispensing system for clothes washing machine or the like

CA 1280907 C · Owner: Torita, Fumio · Inventors: Torita, Fumio; Ikeda, Yoshio

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 detergent dispensing system for clothes washing machines consists of a detergent containing hopper having a detergent discharging passageway having the section of approximately semicircular configuration and formed at the bottom portion, a spiral coil arranged in the detergent discharging passageway and discharging the powdered detergent contained in the hopper by screw action caused by its rotation so that the powdered detergent is dispensed to a wash tub of a clothes washing machine an, electric motor for driving the coil a first manually, operated switch for inputting data of a kind of the powdered detergent to be dispensed, a second manually operated switch for inputting data of …

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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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 12, 1987
GrantedMarch 5, 1991
Term endedMarch 5, 2008
Patent numberCA 1280907 C
Classification (IPC)D06F39/02 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedFeb 12, 1987Patent grantedMarch 5, 1991Term endedMarch 5, 2008

Sources & verification

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