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Expired Canadian patentCanada

Method of humidifying a gas

CA 1258618 A · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Murayama, Katsutoshi; Hoshi, Younosuke; Niwa, Kensuke

CIPO record

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Abstract From the Canadian patent

A wetted wall type humidifier in which liquid which is composed of or mainly composed of water flows down a heated vertical wall to form a wetted wall so that gas flows along the wetted wall while being in contact with liquid on the wetted wall to increase the humidity contained in the gas is characterized by the provision of means for supplying the more amount of liquid than the amount of liquid used or evaporated for increasing the humidity and recirculating, the liquid which is not evaporated in an outlet of the wetted wall to a liquid supply portion and in that the amount of the flowing liquid is adapted to satisfy the following equation:, q < 5.99x105.GAMMA.2.12 ..... (1) where q is …

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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 August 22, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 22, 2006.
  • 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 13, 1984
GrantedAugust 22, 1989
Term endedAugust 22, 2006
Patent numberCA 1258618 A
Classification (IPC)B01F3/04

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedNov 13, 1984Patent grantedAug 22, 1989Term endedAug 22, 2006

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