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Expired Canadian patentCanada

Device for condensing organic solvents

CA 1280649 C · Owner: Knox, Arthur C. Jr. · Inventors: Knox, Arthur C. Jr.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A condenser for separating solvent vapors from non-condensable gases. The condenser includes an outer shell a middle shell, inside the outer shell end an inner shell inside the middle shell. The shells are coaxial and the middle shell is open at the bottom. Mixed solvent vapors and non-condensing gas pass downwardly through an annular space between the inner and middle shells. There is a condensate receiving chamber in the outer shell below the lower end of the middle shell. A cold trap is mounted in the upper portion of the condensate receiving chamber. Coolant is introduced into the cold trap to cool the cold trap. Helical tube means mounted on the cold trap receives the coolant 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 February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 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 26, 1988
GrantedFebruary 26, 1991
Term endedFebruary 26, 2008
Patent numberCA 1280649 C
Classification (IPC)F28B3/00 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedFeb 26, 1988Patent grantedFeb 26, 1991Term endedFeb 26, 2008

Sources & verification

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