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Expired Canadian patentCanada

Separator for use in boreholes of limited diameter

CA 1108982 A · Owner: Laval, Claude C. Jr. · Inventors: Laval, Claude C. Jr.

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 separator for use in boreholes of limited diameter having a vortex chamber adapted to be received in the borehole having upper and lower ends and including a sidewall constituting a surface of revolution; a tubular vortex finder concentrically disposed in the upper end of the chamber defining an annular throat therebetween; a swirling chamber interconnecting the upper end of the vortex chamber and the vortex finder and providing a surface of revolution of larger diameter than the vortex chamber disposed concentrically thereabout; and an axially facing, swirl inducing inlet extended outwardly of the chamber to admit fluid from the borehole into the swirling chamber and through the throat …

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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 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 22, 1979
GrantedSeptember 15, 1981
Term endedSeptember 15, 1998
Patent numberCA 1108982 A
Classification (IPC)B01D21/26 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJune 22, 1979Patent grantedSep 15, 1981Term endedSep 15, 1998

Sources & verification

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