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Expired Canadian patentCanada

Internal shut-off assembly for ultrasonic dispersion nozzle

CA 1309122 C · Owner: M & T Chemicals Inc. · Inventors: Mckown, Clem S.

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 ultrasonic nozzle includes an atomizing surface for producing an atomized liquid spray. A liquid feed passageway having an inlet supplied with a liquid and an outlet for supplying said liquid to said atomizing surface is provided. The passageway has a first section with a first diameter and a second fluidly connected section with a second, smaller diameter with a shoulder, defined between the first and second sections of the passageway. Vibration means are provided for supplying atomizing vibrations to the atomizing surface at an ultrasonic frequency. Internal shut-off means are positioned within the passageway and cooperate with the shoulder for preventing said supply of liquid to said …

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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 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.
FiledAugust 27, 1987
GrantedOctober 20, 1992
Term endedOctober 20, 2009
Patent numberCA 1309122 C
Classification (IPC)B05B17/06 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 27, 1987Patent grantedOct 20, 1992Term endedOct 20, 2009

Sources & verification

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