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Expired Canadian patentCanada

Method and apparatus to convert a long tube vertical evaporator to a falling film evaporator

CA 1260382 A · Owner: Graver Company (The) · Inventors: Flores, A. Roland

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Abstract From the Canadian patent

A method and apparatus for converting a long tube vertical evaporator to a falling film evaporator in a manner which permits salvaging most of the long tube vertical evaporator structure. The bottom chamber of the existing evaporator is extended to define a flash chamber intermediate the existing heat exchanger chamber and the bottom chamber. A vapor riser conduit is provided for directing vapor from the flash chamber to the vapor separation chamber positioned above the heat exchanger chamber. A recirculation conduit is provided for directing liquid from the bottom chamber therethrough into a distribution chamber which is provided above and in communication with the upper ends of the heat …

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 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.
FiledDecember 23, 1986
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260382 A
Classification (IPC)B01D1/22 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedDec 23, 1986Patent grantedSep 26, 1989Term endedSep 26, 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.