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Expired Canadian patentCanada

Separating filtrates free of particles from liquid particle mixtures

CA 1198686 A · Owner: Cobe Laboratories, Inc. · Inventors: Antwiler, Glen D.

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

Apparatus for separating a liquid filtrate free of particles larger than a predetermined size from a liquid mixture of the particles, the apparatus including housing means having a particle mixture inlet port, a particle mixture outlet port, and a liquid filtrate outlet port; a microporous membrane mounted within the housing means to define a particle mixture flow channel and a filtrate channel, each channel being bounded on one side by opposite sides of said membrane the particle, mixture channel being in communication with the particle mixture inlet port and the particle mixture outlet port the, filtrate channel being in communication with the filtrate outlet port; and means to vary 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 December 31, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 7, 1982
GrantedDecember 31, 1985
Term endedDecember 31, 2002
Patent numberCA 1198686 A
Classification (IPC)A61M1/16 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJuly 7, 1982Patent grantedDec 31, 1985Term endedDec 31, 2002

Sources & verification

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